diff --git a/.jshintignore b/.eslintignore
similarity index 100%
rename from .jshintignore
rename to .eslintignore
diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 0000000..f2cf6c8
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,49 @@
+{
+	"extends": ["airbnb", "prettier", "prettier/react"],
+	"parser": "babel-eslint",
+	"parserOptions": {"ecmaVersion": 6, "sourceType": "module"},
+	"env": {"browser": true, "jest": true, "mocha": true, "node": true},
+	"reportUnusedDisableDirectives": true,
+	"rules": {
+		"no-param-reassign-allow-reduce/allow-reduce": 2,
+		"camelcase": 0,
+		"class-methods-use-this": 0,
+		"consistent-return": 0,
+		"default-case": 0,
+		"global-require": 0,
+		"import/default": 0,
+		"import/no-extraneous-dependencies": [
+			"error",
+			{
+				"devDependencies": true,
+				"optionalDependencies": false,
+				"peerDependencies": true
+			}
+		],
+		"import/prefer-default-export": 0,
+		"lines-between-class-members": 0,
+		"max-statements": [2, 15],
+		"new-cap": 0,
+		"no-alert": 2,
+		"no-async-promise-executor": 0,
+		"no-case-declarations": 0,
+		"no-control-regex": 0,
+		"no-console": 1,
+		"no-extra-boolean-cast": 0,
+		"no-fallthrough": ["error", {"commentPattern": "break[\\s\\w]*omitted"}],
+		"no-only-tests/no-only-tests": 2,
+		"no-param-reassign": 0,
+		"no-restricted-globals": 0,
+		"no-restricted-syntax": ["error", "ForInStatement", "LabeledStatement", "WithStatement"],
+		"no-return-assign": 0,
+		"no-underscore-dangle": 0,
+		"no-useless-escape": 0,
+		"no-useless-return": 0,
+		"one-var": 0,
+		"operator-assignment": 0,
+		"padding-line-between-statements": ["error", {"blankLine": "always", "next": "export", "prev": "const"}],
+		"prefer-const": 0,
+		"prefer-promise-reject-errors": 0,
+		"prefer-template": 0
+	}
+}
diff --git a/.jshintrc b/.jshintrc
index c408fd1..0ed71f2 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -1,16 +1,9 @@
 {
-	"predef": [
-	"before",
-	"after",
-	"it",
-	"describe",
-	"beforeEach",
-	"afterEach"
-	],
-	"asi" : false,
-	"bitwise" : true,
-	"boss" : false,
-	"curly" : true,
+	"predef": ["before", "after", "it", "describe", "beforeEach", "afterEach"],
+	"asi": false,
+	"bitwise": true,
+	"boss": false,
+	"curly": true,
 	"debug": false,
 	"devel": false,
 	"eqeqeq": false,
@@ -18,12 +11,12 @@
 	"expr": true,
 	"forin": false,
 	"immed": true,
-	"latedef" : false,
+	"latedef": false,
 	"laxbreak": false,
 	"multistr": true,
 	"newcap": true,
 	"noarg": true,
-	"node" : true,
+	"node": true,
 	"noempty": false,
 	"nonew": true,
 	"onevar": false,
@@ -31,8 +24,7 @@
 	"regexp": false,
 	"strict": false,
 	"sub": false,
-	"trailing" : true,
+	"trailing": true,
 	"undef": true,
 	"unused": true
-
-}
\ No newline at end of file
+}
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..2bdd1fd
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,33 @@
+{
+	"printWidth": 120,
+	"arrowParens": "always",
+	"semi": true,
+	"useTabs": true,
+	"tabWidth": 4,
+	"bracketSpacing": false,
+	"jsxBracketSameLine": false,
+	"singleQuote": true,
+	"trailingComma": "es5",
+	"overrides": [
+		{
+			"files": [".prettierrc", ".eslintrc", ".stylelintrc", ".babelrc"],
+			"options": {
+				"parser": "json"
+			}
+		},
+		{
+			"files": ["*.yaml", "*.yml"],
+			"options": {
+				"useTabs": false,
+				"tabWidth": 2
+			}
+		},
+		{
+			"files": ["package.json"],
+			"options": {
+				"useTabs": false,
+				"tabWidth": 2
+			}
+		}
+	]
+}
diff --git a/Collection.js b/Collection.js
index dde5757..e697b9f 100644
--- a/Collection.js
+++ b/Collection.js
@@ -1,7 +1,6 @@
 var _ = require('./util');
 var Cursor = require('./Cursor');
-function noop() {
-}
+function noop() {}
 
 function Collection(initialArray) {
 	this._data = initialArray.slice();
@@ -24,7 +23,7 @@ Collection.prototype.save = function (doc, options, callback) {
 		callback = options;
 	}
 	if (doc._id) {
-		this.update({_id: doc._id}, doc, { upsert: true }, callback);
+		this.update({_id: doc._id}, doc, {upsert: true}, callback);
 	} else {
 		this.insert(doc, callback);
 	}
@@ -36,7 +35,7 @@ Collection.prototype.findOne = function (query, callback) {
 
 Collection.prototype.count = function (query, options, callback) {
 	if ('function' === typeof options) {
-		callback = options, options = {};
+		(callback = options), (options = {});
 	}
 	if (options === null) {
 		options = {};
@@ -58,7 +57,7 @@ Collection.prototype.toArray = function (callback) {
 
 Collection.prototype.insert = function (doc, options, callback) {
 	if ('function' === typeof options) {
-		callback = options, options = {};
+		(callback = options), (options = {});
 	}
 
 	if (options === null) {
@@ -76,7 +75,7 @@ Collection.prototype.insert = function (doc, options, callback) {
 
 Collection.prototype.update = function (query, modifier, options, callback) {
 	if ('function' === typeof options) {
-		callback = options, options = {};
+		(callback = options), (options = {});
 	}
 
 	if (options === null) {
@@ -106,7 +105,7 @@ Collection.prototype.remove = function (query, callback) {
 
 Collection.prototype.findAndModify = function (query, sort, modifier, options, callback) {
 	if ('function' === typeof options) {
-		callback = options, options = {};
+		(callback = options), (options = {});
 	}
 
 	if (options === null) {
@@ -126,4 +125,4 @@ Collection.prototype.findAndModify = function (query, sort, modifier, options, c
 	callback(null, doc);
 };
 
-module.exports = Collection;
\ No newline at end of file
+module.exports = Collection;
diff --git a/Collection.ts b/Collection.ts
new file mode 100644
index 0000000..06ff84f
--- /dev/null
+++ b/Collection.ts
@@ -0,0 +1,10 @@
+import {Cursor} from './Cursor';
+
+export class Collection<T extends object> {
+	private items: T[];
+	constructor(data: T[]) {
+		this.items = {...data};
+	}
+	private restore() {}
+	public find(query: Record<string, any>): Cursor<T> {}
+}
diff --git a/Cursor.js b/Cursor.js
index 830c16b..865364c 100644
--- a/Cursor.js
+++ b/Cursor.js
@@ -1,114 +1,110 @@
-//cowboy cursor mock
-var util = require('util');
-var _q = require('./util');
-var ReadableStream = require('stream').Readable;
-function map(fields) {
-	var keys = Object.keys(fields);
-	var exclude = keys.every(function(key) {
-		return fields[key] === -1;
-	});
-	var include = keys.every(function(key) {
-		return !!fields[key] && fields[key] !== -1;
-	});
-	if(!exclude && !include) {
-		throw 'you can either select fields to include, or select fields to exclude';
-	}
-	return function(doc) {
-		var mapped = {};
-
-		if (exclude) {
-			keys.forEach(function (key) {
-				delete doc[key];
-			});
-			return doc;
-		}
-
-		keys.forEach(function (key) {
-			mapped[key] = doc[key];
-		});
-		return mapped;
-	};
-}
-
-var Cursor = function (source, query, fields, options) {
-	this._fields = fields || {};
-	this._source =_q(source).find(query, options);
-	this.data = null;
-	this.index = 0;
-	ReadableStream.call(this, {objectMode: true});
-};
-
-util.inherits(Cursor, ReadableStream);
-
-Cursor.prototype._read = function () {
-	var self = this;
-
-	if (this.index < this._source.length) {
-		//mock 'reading time' 
-		setTimeout(function () {
-			self.push(map(self._fields)(self._source[self.index]));
-			self.index++;
-		},5);
-	} else {
-		self.push(null);
-	}
-};
-
-Cursor.prototype.toArray = function (callback) {
-	if (this.data===null) {
-		this.data = this._source.map(map(this._fields));
-	}
-	callback(null, this.data);
-};
-
-Cursor.prototype.sort = function(sortObj) {
-	if (this.data===null) {
-		this.data = this._source.map(map(this._fields));
-	}
-	this.data = this.data.sort(function(i1,i2){
-		for (var d in sortObj) {
-			if (sortObj.hasOwnProperty(d)) {
-				if (i1[d]>i2[d]) {
-					return sortObj[d];
-				}
-				if (i1[d]<i2[d]) {
-					return -1*sortObj[d];
-				}
-			}
-		}
-		return 0;
-	});
-	return this;
-};
-
-Cursor.prototype.hasNext = function() {
-	if (this.data===null) {
-		this.data = this._source.map(map(this._fields));
-	}
-	return this.index<this.data.length;
-};
-
-Cursor.prototype.next = function() {
-	if (this.data===null) {
-		this.data = this._source.map(map(this._fields));
-	}
-	var dat = this.data[this.index];
-	this.index++;
-	return dat;
-};
-
-Cursor.prototype.batchSize = function() {
-	return this;
-};
-
-Cursor.prototype.addCursorFlag = function() {
-	return this;
-};
-
-Cursor.prototype.close = function() {
-
-};
-
-
-
-module.exports = Cursor;
\ No newline at end of file
+//cowboy cursor mock
+var util = require('util');
+var _q = require('./util');
+var ReadableStream = require('stream').Readable;
+function map(fields) {
+	var keys = Object.keys(fields);
+	var exclude = keys.every(function (key) {
+		return fields[key] === -1;
+	});
+	var include = keys.every(function (key) {
+		return !!fields[key] && fields[key] !== -1;
+	});
+	if (!exclude && !include) {
+		throw 'you can either select fields to include, or select fields to exclude';
+	}
+	return function (doc) {
+		var mapped = {};
+
+		if (exclude) {
+			keys.forEach(function (key) {
+				delete doc[key];
+			});
+			return doc;
+		}
+
+		keys.forEach(function (key) {
+			mapped[key] = doc[key];
+		});
+		return mapped;
+	};
+}
+
+var Cursor = function (source, query, fields, options) {
+	this._fields = fields || {};
+	this._source = _q(source).find(query, options);
+	this.data = null;
+	this.index = 0;
+	ReadableStream.call(this, {objectMode: true});
+};
+
+util.inherits(Cursor, ReadableStream);
+
+Cursor.prototype._read = function () {
+	var self = this;
+
+	if (this.index < this._source.length) {
+		//mock 'reading time'
+		setTimeout(function () {
+			self.push(map(self._fields)(self._source[self.index]));
+			self.index++;
+		}, 5);
+	} else {
+		self.push(null);
+	}
+};
+
+Cursor.prototype.toArray = function (callback) {
+	if (this.data === null) {
+		this.data = this._source.map(map(this._fields));
+	}
+	callback(null, this.data);
+};
+
+Cursor.prototype.sort = function (sortObj) {
+	if (this.data === null) {
+		this.data = this._source.map(map(this._fields));
+	}
+	this.data = this.data.sort(function (i1, i2) {
+		for (var d in sortObj) {
+			if (sortObj.hasOwnProperty(d)) {
+				if (i1[d] > i2[d]) {
+					return sortObj[d];
+				}
+				if (i1[d] < i2[d]) {
+					return -1 * sortObj[d];
+				}
+			}
+		}
+		return 0;
+	});
+	return this;
+};
+
+Cursor.prototype.hasNext = function () {
+	if (this.data === null) {
+		this.data = this._source.map(map(this._fields));
+	}
+	return this.index < this.data.length;
+};
+
+Cursor.prototype.next = function () {
+	if (this.data === null) {
+		this.data = this._source.map(map(this._fields));
+	}
+	var dat = this.data[this.index];
+	this.index++;
+	return dat;
+};
+
+Cursor.prototype.batchSize = function () {
+	return this;
+};
+
+Cursor.prototype.addCursorFlag = function () {
+	return this;
+};
+
+Cursor.prototype.close = function () {};
+
+module.exports = Cursor;
diff --git a/Cursor.ts b/Cursor.ts
new file mode 100644
index 0000000..d099415
--- /dev/null
+++ b/Cursor.ts
@@ -0,0 +1,3 @@
+export class Cursor<T extends object> {
+	constructor() {}
+}
diff --git a/MongoMock.js b/MongoMock.js
deleted file mode 100644
index 6e45c9a..0000000
--- a/MongoMock.js
+++ /dev/null
@@ -1,24 +0,0 @@
-var Collection = require("./Collection");
-
-function MongoMock (collections) {
-	var self = this;
-	Object.keys(collections).forEach(function(key) {
-		if(!collections[key] instanceof Array){
-			throw key+" collection should be an array";
-		}
-		self[key] = new Collection(collections[key]);
-	});
-}
-
-MongoMock.prototype.collection = function(collectionName, callback) {
-	if(!callback) {
-		return this[collectionName];
-	}
-	return callback(null, this[collectionName]);
-};
-
-MongoMock.prototype.ensureIndex = function (collection, index, options, callback) {
-	callback(null, index);
-};
-
-module.exports = MongoMock;
\ No newline at end of file
diff --git a/MongoMock.ts b/MongoMock.ts
new file mode 100644
index 0000000..ba6d9df
--- /dev/null
+++ b/MongoMock.ts
@@ -0,0 +1,17 @@
+import {Collection} from './Collection';
+
+export class MongoMock {
+	private collections: Map<string, Collection<any>> = new Map();
+
+	setCollection<T extends object>(collectionName: string, data: T[]) {
+		this.collections.set(collectionName, new Collection<T>(data));
+	}
+
+	async collection<T extends object>(collectionName: string): Promise<Collection<T> | undefined> {
+		const collection = this.collections.get(collectionName);
+		if (typeof collection !== undefined) {
+			return collection as Collection<T>;
+		}
+		return undefined;
+	}
+}
diff --git a/README.md b/README.md
index 2554684..8450df1 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 [![NPM](https://nodei.co/npm/mongomock.png?downloads=true)](https://nodei.co/npm/mongomock/)
 
-mongomock
-=========
+# mongomock
 
 mongoDb-native mocking library
 
@@ -15,6 +14,7 @@ You can try a playground [here](http://andrewgrachov.github.io/mongo-query/)
 **bson**
 
 #Install
+
 ```
 npm install mongomock
 ```
@@ -37,12 +37,12 @@ mongo.collection('fruits').find({price:20}).toArray(function(err,fruits){
   console.log("YAHOO we have fruits with price 20 now!",fruits);
 })
 ```
+
 **Update 0.1.0**
 basic cursor implementation without skip/limit chaining
 
 #Testing
 
-
 Tests use mocha. Install mocha globally, then run
 
 ```
@@ -50,67 +50,67 @@ npm test
 ```
 
 #Methods support
-  **collection.find(query, fields, options)** - returns readable stream
+**collection.find(query, fields, options)** - returns readable stream
 
-  **collection.findOne(query, callback)**
+**collection.findOne(query, callback)**
 
-  **collection.update(query,modifier,options,callback)**
+**collection.update(query,modifier,options,callback)**
 
-  **collection.insert(doc,callback)**
+**collection.insert(doc,callback)**
 
-  **collection.remove(query,callback)**
+**collection.remove(query,callback)**
 
-  **collection.findAndModify(doc,modifier,options,callback)**
+**collection.findAndModify(doc,modifier,options,callback)**
 
-  **collection.save(doc,callback)**
+**collection.save(doc,callback)**
 
 #Query operators support:
-  **$gte**
+**\$gte**
 
-  **$gt**
+**\$gt**
 
-  **$lt**
+**\$lt**
 
-  **$lte**
+**\$lte**
 
-  **$in**
+**\$in**
 
-  **$regex**
+**\$regex**
 
-  **$and**
+**\$and**
 
-  **$or**
+**\$or**
 
-  **$ne**
+**\$ne**
 
-  **$nin**
+**\$nin**
 
-  **$size**
+**\$size**
 
-  **$elemMatch**
+**\$elemMatch**
 
-  **$exists**
+**\$exists**
 
-  **$all**
+**\$all**
 
 #Modifier operators support
-  **$set**
+**\$set**
 
-  **$unset**
+**\$unset**
 
-  **$inc**
+**\$inc**
 
-  **$addToSet**
+**\$addToSet**
 
-  **$rename**
+**\$rename**
 
-  **$pull**
+**\$pull**
 
-  **$push**
+**\$push**
 
-  **$each**
+**\$each**
 
 #On the way
+
 1. Date(and types) support
 2. projections support
-
diff --git a/example.js b/example.js
index b20bf44..46a205c 100644
--- a/example.js
+++ b/example.js
@@ -2,28 +2,24 @@ var MongoMock = require('./MongoMock');
 
 var db = {
 	fruits: [
-		{name: 'Banana', price: 20, something: [
-			{name: 2}
-		]},
-		{name: 'Apple', price: 10, tags: ['Africa', 'Turkey'], something: [
-			{name: 1}
-		]},
+		{name: 'Banana', price: 20, something: [{name: 2}]},
+		{name: 'Apple', price: 10, tags: ['Africa', 'Turkey'], something: [{name: 1}]},
 		{name: 'Orange', price: 25},
-		{name: 'Pineapple', price: 20}
+		{name: 'Pineapple', price: 20},
 	],
 	beverages: [
 		{name: 'CocaCola', price: 15},
 		{name: 'MongoCola', price: 10},
-		{name: 'Pepsi', price: 25}
-	]
+		{name: 'Pepsi', price: 25},
+	],
 };
 
 var mongo = new MongoMock(db);
 
 mongo.collection('fruits').findAndModify({name: 'Banana'}, {$set: {price: 50}}, function (err, doc) {
-	console.log("fruit:", doc);
+	console.log('fruit:', doc);
 });
 
 mongo.collection('fruits').find({something: {$elemMatch: {name: 1}}}, function (err, fruits) {
-	console.log("fruits:", fruits);
-});
\ No newline at end of file
+	console.log('fruits:', fruits);
+});
diff --git a/index.js b/index.js
index 6476321..b0ea05f 100644
--- a/index.js
+++ b/index.js
@@ -1,2 +1,2 @@
 var MongoMock = require('./MongoMock');
-module.exports = MongoMock;
\ No newline at end of file
+module.exports = MongoMock;
diff --git a/package-lock.json b/package-lock.json
index b3c89e4..5fda970 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,763 +1,493 @@
 {
-  "name": "mongomock",
-  "version": "0.1.2",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "assertion-error": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.0.0.tgz",
-      "integrity": "sha1-x/hUOP3UZrx8oWq5DIFRN5el0js=",
-      "dev": true
-    },
-    "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
-    },
-    "base64-js": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
-      "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
-    },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
-    "bson": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-4.0.2.tgz",
-      "integrity": "sha512-rBdCxMBCg2aR420e1oKUejjcuPZLTibA7zEhWAlliFWEwzuBCC9Dkp5r7VFFIQB2t1WVsvTbohry575mc7Xw5A==",
-      "requires": {
-        "buffer": "^5.1.0",
-        "long": "^4.0.0"
-      }
-    },
-    "buffer": {
-      "version": "5.4.3",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.3.tgz",
-      "integrity": "sha512-zvj65TkFeIt3i6aj5bIvJDzjjQQGs4o/sNoezg1F1kYap9Nu2jcUdpwzRSJTHMMzG0H7bZkn4rNQpImhuxWX2A==",
-      "requires": {
-        "base64-js": "^1.0.2",
-        "ieee754": "^1.1.4"
-      }
-    },
-    "chai": {
-      "version": "1.10.0",
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+		"is-generator-function": {
+			"version": "1.0.7",
+			"resolved": "https://registry.npmjs.org/is-generator-function/-/is-generator-function-1.0.7.tgz",
+			"integrity": "sha512-YZc5EwyO4f2kWCax7oegfuSr9mFz1ZvieNYBEjmukLxgXfBUbxAWGVF7GZf0zidYtoBl3WvC07YK0wT76a+Rtw==",
+			"dev": true
+		},
+		"is-regex": {
+			"version": "1.0.4",
+			"resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.4.tgz",
+			"integrity": "sha1-VRdIm1RwkbCTDglWVM7SXul+lJE=",
+			"dev": true,
+			"requires": {
+				"has": "^1.0.1"
+			}
+		},
+		"is-symbol": {
+			"version": "1.0.3",
+			"resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.3.tgz",
+			"integrity": "sha512-OwijhaRSgqvhm/0ZdAcXNZt9lYdKFpcRDT5ULUuYXPoT794UNOdU+gpT6Rzo7b4V2HUl/op6GqY894AZwv9faQ==",
+			"dev": true,
+			"requires": {
+				"has-symbols": "^1.0.1"
+			}
+		},
+		"isarray": {
+			"version": "0.0.1",
+			"resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
+			"integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+			"dev": true
+		},
+		"jade": {
+			"version": "0.26.3",
+			"resolved": "https://registry.npmjs.org/jade/-/jade-0.26.3.tgz",
+			"integrity": "sha1-jxDXl32NefL2/4YqgbBRPMslaGw=",
+			"dev": true,
+			"requires": {
+				"commander": "0.6.1",
+				"mkdirp": "0.3.0"
+			},
+			"dependencies": {
+				"commander": {
+					"version": "0.6.1",
+					"resolved": "https://registry.npmjs.org/commander/-/commander-0.6.1.tgz",
+					"integrity": "sha1-+mihT2qUXVTbvlDYzbMyDp47GgY=",
+					"dev": true
+				},
+				"mkdirp": {
+					"version": "0.3.0",
+					"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.0.tgz",
+					"integrity": "sha1-G79asbqCevI1dRQ0kEJkVfSB/h4=",
+					"dev": true
+				}
+			}
+		},
+		"kerberos": {
+			"version": "0.0.3",
+			"resolved": "https://registry.npmjs.org/kerberos/-/kerberos-0.0.3.tgz",
+			"integrity": "sha1-QoXZKgdI2yeEBi9a3OyfWVbLgYo=",
+			"dev": true,
+			"optional": true
+		},
+		"lolex": {
+			"version": "1.3.2",
+			"resolved": "https://registry.npmjs.org/lolex/-/lolex-1.3.2.tgz",
+			"integrity": "sha1-fD2mL/yzDw9agKJWbKJORdigHzE=",
+			"dev": true
+		},
+		"long": {
+			"version": "4.0.0",
+			"resolved": "https://registry.npmjs.org/long/-/long-4.0.0.tgz",
+			"integrity": "sha512-XsP+KhQif4bjX1kbuSiySJFNAehNxgLb6hPRGJ9QsUr8ajHkuXGdrHmFUTUUXhDwVX2R5bY4JNZEwbUiMhV+MA=="
+		},
+		"lru-cache": {
+			"version": "2.7.3",
+			"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.7.3.tgz",
+			"integrity": "sha1-bUUk6LlV+V1PW1iFHOId1y+06VI=",
+			"dev": true
+		},
+		"mkdirp": {
+			"version": "0.3.5",
+			"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.5.tgz",
+			"integrity": "sha1-3j5fiWHIjHh+4TaN+EmsRBPsqNc=",
+			"dev": true
+		},
+		"mocha": {
+			"version": "1.20.1",
+			"resolved": "https://registry.npmjs.org/mocha/-/mocha-1.20.1.tgz",
+			"integrity": "sha1-80ODLZ/gx9l8ZPxwRI9RNt+f7Vs=",
+			"dev": true,
+			"requires": {
+				"commander": "2.0.0",
+				"debug": "*",
+				"diff": "1.0.7",
+				"glob": "3.2.3",
+				"growl": "1.7.x",
+				"jade": "0.26.3",
+				"mkdirp": "0.3.5"
+			},
+			"dependencies": {
+				"glob": {
+					"version": "3.2.3",
+					"resolved": "https://registry.npmjs.org/glob/-/glob-3.2.3.tgz",
+					"integrity": "sha1-4xPusknHr/qlxHUoaw4RW1mDlGc=",
+					"dev": true,
+					"requires": {
+						"graceful-fs": "~2.0.0",
+						"inherits": "2",
+						"minimatch": "~0.2.11"
+					}
+				},
+				"minimatch": {
+					"version": "0.2.14",
+					"resolved": "https://registry.npmjs.org/minimatch/-/minimatch-0.2.14.tgz",
+					"integrity": "sha1-x054BXT2PG+aCQ6Q775u9TpqdWo=",
+					"dev": true,
+					"requires": {
+						"lru-cache": "2",
+						"sigmund": "~1.0.0"
+					}
+				}
+			}
+		},
+		"mongodb": {
+			"version": "1.4.0",
+			"resolved": "https://registry.npmjs.org/mongodb/-/mongodb-1.4.0.tgz",
+			"integrity": "sha1-ygo8gedq+ba4bz1eCrnqq3IgLdc=",
+			"dev": true,
+			"requires": {
+				"bson": "0.2.7",
+				"kerberos": "0.0.3"
+			},
+			"dependencies": {
+				"bson": {
+					"version": "0.2.7",
+					"resolved": "https://registry.npmjs.org/bson/-/bson-0.2.7.tgz",
+					"integrity": "sha1-Z5MWHEDlqXVwkdfufVKkcXlQI2s=",
+					"dev": true,
+					"requires": {
+						"nan": "~0.8.0"
+					}
+				}
+			}
+		},
+		"mongojs": {
+			"version": "0.12.1",
+			"resolved": "https://registry.npmjs.org/mongojs/-/mongojs-0.12.1.tgz",
+			"integrity": "sha1-j8jBuQQtoaYgjYEE1CXDNcgoX6s=",
+			"dev": true,
+			"requires": {
+				"mongodb": "1.4.0",
+				"readable-stream": "~1.1.9",
+				"thunky": "~0.1.0"
+			}
+		},
+		"ms": {
+			"version": "2.1.2",
+			"resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+			"integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+			"dev": true
+		},
+		"nan": {
+			"version": "0.8.0",
+			"resolved": "https://registry.npmjs.org/nan/-/nan-0.8.0.tgz",
+			"integrity": "sha1-AiqPpen+hCCWSsH7PclOF/RJ9f0=",
+			"dev": true
+		},
+		"object-inspect": {
+			"version": "1.7.0",
+			"resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.7.0.tgz",
+			"integrity": "sha512-a7pEHdh1xKIAgTySUGgLMx/xwDZskN1Ud6egYYN3EdRW4ZMPNEDUTF+hwy2LUC+Bl+SyLXANnwz/jyh/qutKUw==",
+			"dev": true
+		},
+		"object-keys": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
+			"integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
+			"dev": true
+		},
+		"object.entries": {
+			"version": "1.1.0",
+			"resolved": "https://registry.npmjs.org/object.entries/-/object.entries-1.1.0.tgz",
+			"integrity": "sha512-l+H6EQ8qzGRxbkHOd5I/aHRhHDKoQXQ8g0BYt4uSweQU1/J6dZUOyWh9a2Vky35YCKjzmgxOzta2hH6kf9HuXA==",
+			"dev": true,
+			"requires": {
+				"define-properties": "^1.1.3",
+				"es-abstract": "^1.12.0",
+				"function-bind": "^1.1.1",
+				"has": "^1.0.3"
+			}
+		},
+		"prettier": {
+			"version": "2.0.5",
+			"resolved": "https://npm.welayout.com/prettier/-/prettier-2.0.5.tgz",
+			"integrity": "sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==",
+			"dev": true
+		},
+		"readable-stream": {
+			"version": "1.1.14",
+			"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
+			"integrity": "sha1-fPTFTvZI44EwhMY23SB54WbAgdk=",
+			"dev": true,
+			"requires": {
+				"core-util-is": "~1.0.0",
+				"inherits": "~2.0.1",
+				"isarray": "0.0.1",
+				"string_decoder": "~0.10.x"
+			}
+		},
+		"safe-buffer": {
+			"version": "5.2.0",
+			"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+			"integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==",
+			"dev": true
+		},
+		"samsam": {
+			"version": "1.1.2",
+			"resolved": "https://registry.npmjs.org/samsam/-/samsam-1.1.2.tgz",
+			"integrity": "sha1-vsEf3IOp/aBjQBIQ5AF2wwJNFWc=",
+			"dev": true
+		},
+		"sigmund": {
+			"version": "1.0.1",
+			"resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
+			"integrity": "sha1-P/IfGYytIXX587eBhT/ZTQ0ZtZA=",
+			"dev": true
+		},
+		"sinon": {
+			"version": "1.17.7",
+			"resolved": "https://registry.npmjs.org/sinon/-/sinon-1.17.7.tgz",
+			"integrity": "sha1-RUKk9JugxFwF6y6d2dID4rjv4L8=",
+			"dev": true,
+			"requires": {
+				"formatio": "1.1.1",
+				"lolex": "1.3.2",
+				"samsam": "1.1.2",
+				"util": ">=0.10.3 <1"
+			}
+		},
+		"sinon-chai": {
+			"version": "2.14.0",
+			"resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-2.14.0.tgz",
+			"integrity": "sha512-9stIF1utB0ywNHNT7RgiXbdmen8QDCRsrTjw+G9TgKt1Yexjiv8TOWZ6WHsTPz57Yky3DIswZvEqX8fpuHNDtQ==",
+			"dev": true
+		},
+		"string.prototype.trimleft": {
+			"version": "2.1.0",
+			"resolved": "https://registry.npmjs.org/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz",
+			"integrity": "sha512-FJ6b7EgdKxxbDxc79cOlok6Afd++TTs5szo+zJTUyow3ycrRfJVE2pq3vcN53XexvKZu/DJMDfeI/qMiZTrjTw==",
+			"dev": true,
+			"requires": {
+				"define-properties": "^1.1.3",
+				"function-bind": "^1.1.1"
+			}
+		},
+		"string.prototype.trimright": {
+			"version": "2.1.0",
+			"resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz",
+			"integrity": "sha512-fXZTSV55dNBwv16uw+hh5jkghxSnc5oHq+5K/gXgizHwAvMetdAJlHqqoFC1FSDVPYWLkAKl2cxpUT41sV7nSg==",
+			"dev": true,
+			"requires": {
+				"define-properties": "^1.1.3",
+				"function-bind": "^1.1.1"
+			}
+		},
+		"string_decoder": {
+			"version": "0.10.31",
+			"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+			"integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+			"dev": true
+		},
+		"thunky": {
+			"version": "0.1.0",
+			"resolved": "https://registry.npmjs.org/thunky/-/thunky-0.1.0.tgz",
+			"integrity": "sha1-vzAUaCTituZ7Dy16Ssi+smkIaE4=",
+			"dev": true
+		},
+		"type-detect": {
+			"version": "0.1.1",
+			"resolved": "https://registry.npmjs.org/type-detect/-/type-detect-0.1.1.tgz",
+			"integrity": "sha1-C6XsKohWQORw6k6FBZcZANrFiCI=",
+			"dev": true
+		},
+		"util": {
+			"version": "0.12.1",
+			"resolved": "https://registry.npmjs.org/util/-/util-0.12.1.tgz",
+			"integrity": "sha512-MREAtYOp+GTt9/+kwf00IYoHZyjM8VU4aVrkzUlejyqaIjd2GztVl5V9hGXKlvBKE3gENn/FMfHE5v6hElXGcQ==",
+			"dev": true,
+			"requires": {
+				"inherits": "^2.0.3",
+				"is-arguments": "^1.0.4",
+				"is-generator-function": "^1.0.7",
+				"object.entries": "^1.1.0",
+				"safe-buffer": "^5.1.2"
+			}
+		}
+	}
 }
diff --git a/package.json b/package.json
index 6f13dd6..773ea97 100644
--- a/package.json
+++ b/package.json
@@ -9,16 +9,17 @@
     "bson": "*"
   },
   "devDependencies": {
-    "jshint": "*",
-    "mocha-jshint": "0.0.7",
     "chai": "^1.9.1",
-    "sinon": "^1.9.1",
-    "sinon-chai": "^2.5.0",
-    "mongojs": "^0.12.0",
+    "expect.js": "~0.3.1",
     "mocha": "~1.20.0",
-    "expect.js": "~0.3.1"
+    "prettier": "^2.0.5",
+    "sinon": "^1.9.1",
+    "sinon-chai": "^2.5.0"
   },
   "scripts": {
-    "test": "node test.js"
+    "test": "node test.js",
+    "lint:ts": "eslint ./src/**/*.ts ./test/**/*.ts",
+    "prettier:fix": "prettier --write .",
+    "prettier:check": "prettier --check ."
   }
 }
diff --git a/test.js b/test.js
index aab4702..436403e 100644
--- a/test.js
+++ b/test.js
@@ -4,4 +4,4 @@ var realProcessExit = process.exit;
 process.exit = function (code) {
 	setTimeout(realProcessExit.bind(process, code), 2000);
 };
-require('./node_modules/mocha/bin/_mocha');
\ No newline at end of file
+require('./node_modules/mocha/bin/_mocha');
diff --git a/test/MongoMock.spec.js b/test/MongoMock.spec.js
index bf4ad71..90766c2 100644
--- a/test/MongoMock.spec.js
+++ b/test/MongoMock.spec.js
@@ -1,20 +1,25 @@
 var MongoMock = require('../MongoMock');
 var Collection = require('../Collection');
 
-//var expect = chai.expect;
-
 describe('When creating MongoMock', function () {
 	var mongo;
 
 	var db = {
-	fruits:[{name:'Banana',price:20},{name:'Apple',price:10,tags:['Africa','Turkey']},{name:'Orange',price:25},{name:'Pineapple',price:20}],
-	beverages:[{name:'CocaCola',price:15},{name:'MongoCola',price:10},{name:'Pepsi',price:25}]
+		fruits: [
+			{name: 'Banana', price: 20},
+			{name: 'Apple', price: 10, tags: ['Africa', 'Turkey']},
+			{name: 'Orange', price: 25},
+			{name: 'Pineapple', price: 20},
+		],
+		beverages: [
+			{name: 'CocaCola', price: 15},
+			{name: 'MongoCola', price: 10},
+			{name: 'Pepsi', price: 25},
+		],
 	};
 
-
 	mongo = new MongoMock(db);
 
-
 	it('#should return MongoMock object', function () {
 		mongo.should.have.property('collection');
 		mongo.collection.should.be.a('function');
@@ -23,5 +28,4 @@ describe('When creating MongoMock', function () {
 	it('#should return Collection object on collection call', function () {
 		mongo.collection('fruits').should.be.instanceof(Collection);
 	});
-
-});
\ No newline at end of file
+});
diff --git a/test/collection.spec.js b/test/collection.spec.js
index 678fd60..83159bc 100644
--- a/test/collection.spec.js
+++ b/test/collection.spec.js
@@ -7,20 +7,20 @@ describe('Collection test', function () {
 		var db = {
 			fruits: [
 				{name: 'Banana', price: 20},
-				{name: 'Apple', price: 10, tags: ['Africa', 'Turkey'], dueDate:new Date("2020-01-15T00:00:00.000Z")},
-				{name: 'Orange', price: 25, dueDate:new Date("2019-11-01T00:00:00.000Z")},
-				{name: 'Pineapple', price: 20, dueDate:new Date("2019-12-10T00:00:00.000Z")}
+				{name: 'Apple', price: 10, tags: ['Africa', 'Turkey'], dueDate: new Date('2020-01-15T00:00:00.000Z')},
+				{name: 'Orange', price: 25, dueDate: new Date('2019-11-01T00:00:00.000Z')},
+				{name: 'Pineapple', price: 20, dueDate: new Date('2019-12-10T00:00:00.000Z')},
 			],
 			beverages: [
 				{name: 'CocaCola', price: 15},
 				{name: 'MongoCola', price: 10},
-				{name: 'Pepsi', price: 25}
-			]
+				{name: 'Pepsi', price: 25},
+			],
 		};
 		mongo = new MongoMock(db);
 	});
 
-	it("#should have collection functionality", function () {
+	it('#should have collection functionality', function () {
 		mongo.collection('fruits').should.have.property('find');
 		mongo.collection('fruits').should.have.property('findOne');
 		mongo.collection('fruits').should.have.property('findAndModify');
@@ -31,10 +31,13 @@ describe('Collection test', function () {
 
 	describe('when getting all collection by empty find criteria', function () {
 		before(function (done) {
-			mongo.collection('fruits').find({}).toArray(function (err, data) {
-				result = data;
-				done();
-			});
+			mongo
+				.collection('fruits')
+				.find({})
+				.toArray(function (err, data) {
+					result = data;
+					done();
+				});
 		});
 
 		it('#should return all collection', function () {
@@ -43,12 +46,14 @@ describe('Collection test', function () {
 	});
 
 	describe('when filtering collection by basic criteria', function () {
-
 		before(function (done) {
-			mongo.collection('fruits').find({price: 20}).toArray(function (err, fruits) {
-				result = fruits;
-				done();
-			});
+			mongo
+				.collection('fruits')
+				.find({price: 20})
+				.toArray(function (err, fruits) {
+					result = fruits;
+					done();
+				});
 		});
 
 		it('#should return 2 fruits with price 20', function () {
@@ -57,12 +62,14 @@ describe('Collection test', function () {
 	});
 
 	describe('when filtering collection by date equal criteria', function () {
-
 		before(function (done) {
-			mongo.collection('fruits').find({dueDate: new Date("2019-11-01T00:00:00.000Z")}).toArray(function (err, fruits) {
-				result = fruits;
-				done();
-			});
+			mongo
+				.collection('fruits')
+				.find({dueDate: new Date('2019-11-01T00:00:00.000Z')})
+				.toArray(function (err, fruits) {
+					result = fruits;
+					done();
+				});
 		});
 
 		it('#should return 1 fruits with due date 01 Nov 2019', function () {
@@ -71,27 +78,26 @@ describe('Collection test', function () {
 	});
 
 	describe('when filtering collection by complex criteria', function () {
-
 		before(function (done) {
-			var criteria = {$or: [
-				{price: {$gte: 25}} ,
-				{tags: { $in: ['Turkey'] }}
-			]};
-			mongo.collection('fruits').find(criteria).toArray(function (err, fruits) {
-				result = fruits;
-				done();
-			});
+			var criteria = {$or: [{price: {$gte: 25}}, {tags: {$in: ['Turkey']}}]};
+			mongo
+				.collection('fruits')
+				.find(criteria)
+				.toArray(function (err, fruits) {
+					result = fruits;
+					done();
+				});
 		});
 
 		it('#should return 2 fruits, one with price 25 second one with tags containing "Turkey"', function () {
 			result.should.have.length(2);
 			//todo:update
 		});
-
 	});
 
 	describe('when stream collection', function () {
-		var cursor, matchcollection = [];
+		var cursor,
+			matchcollection = [];
 		before(function (done) {
 			cursor = mongo.collection('beverages').find();
 			cursor.on('data', function (doc) {
@@ -106,10 +112,14 @@ describe('Collection test', function () {
 
 	describe('sort collection asceding', function () {
 		before(function (done) {
-			mongo.collection('fruits').find().sort({name:1}).toArray(function (err, fruits) {
-				result = fruits;
-				done();
-			});
+			mongo
+				.collection('fruits')
+				.find()
+				.sort({name: 1})
+				.toArray(function (err, fruits) {
+					result = fruits;
+					done();
+				});
 		});
 		it('should show all fruits sorted', function () {
 			result[0].name.should.equal('Apple');
@@ -117,10 +127,14 @@ describe('Collection test', function () {
 	});
 	describe('sort collection desceding', function () {
 		before(function (done) {
-			mongo.collection('fruits').find().sort({price:-1}).toArray(function (err, fruits) {
-				result = fruits;
-				done();
-			});
+			mongo
+				.collection('fruits')
+				.find()
+				.sort({price: -1})
+				.toArray(function (err, fruits) {
+					result = fruits;
+					done();
+				});
 		});
 		it('should show all fruits sorted', function () {
 			result[0].name.should.equal('Orange');
@@ -136,12 +150,10 @@ describe('Collection test', function () {
 			var totalPrice = 0;
 			while (result.hasNext()) {
 				var item = result.next();
-				totalPrice+=item.price;
+				totalPrice += item.price;
 			}
 			result.close();
 			totalPrice.should.equal(75); // All fruit prices acumulated 20+10+25+20
 		});
 	});
-
-
-});
\ No newline at end of file
+});
diff --git a/test/jshint.spec.js b/test/jshint.spec.js
deleted file mode 100644
index 5cb07d7..0000000
--- a/test/jshint.spec.js
+++ /dev/null
@@ -1 +0,0 @@
-require('mocha-jshint')();
\ No newline at end of file
diff --git a/test/util.spec.js b/test/util.spec.js
index 7f94f51..071f3bb 100644
--- a/test/util.spec.js
+++ b/test/util.spec.js
@@ -8,25 +8,29 @@ describe('mongo-query utility belt test', function () {
 			{name: 'Apple', price: 10, tags: ['Africa', 'Turkey']},
 			{name: 'Orange', price: 20},
 			{name: 'Pineapple', price: 20},
-			{name: 'Cucumber', price: 56, suppliers: [
-				{name: "anonymous234", subSuppliers: [
-					{name: "1", address: 'blahblah'}
-				]}
-			]}
+			{
+				name: 'Cucumber',
+				price: 56,
+				suppliers: [{name: 'anonymous234', subSuppliers: [{name: '1', address: 'blahblah'}]}],
+			},
 		],
 		beverages: [
 			{name: 'CocaCola', price: 15, suppliers: ['one', 'two', 'three']},
 			{name: 'MongoCola', price: 10, suppliers: ['one', 'two', 'three', 'four', 'five', 'six']},
 			{name: 'Pepsi', price: 25, suppliers: ['one', 'two', 'three', 'four', 'five']},
 			{name: 'BoobCola', price: 999, suppliers: ['one', 'two', 'three']},
-			{name: 'ZeroVatkaCola', price: 1000, suppliers: ['one', 'two', 'three'], someArray: ['one', 'two', 'three'], nested: {}, nestedObjectsArray: [
-				{someNestedField: 'value'}
-			]}
-		]
+			{
+				name: 'ZeroVatkaCola',
+				price: 1000,
+				suppliers: ['one', 'two', 'three'],
+				someArray: ['one', 'two', 'three'],
+				nested: {},
+				nestedObjectsArray: [{someNestedField: 'value'}],
+			},
+		],
 	};
 
 	describe('when querying with string expression on array elements', function () {
-
 		var fruits = _(db.fruits).find({'suppliers.name': 'anonymous234'});
 		var subArrayFruit = _(db.fruits).findOne({'suppliers.subSuppliers.0.name': 1});
 		it('#should have length 1', function () {
@@ -40,7 +44,6 @@ describe('mongo-query utility belt test', function () {
 	});
 
 	describe('when perfoming update operation', function () {
-
 		describe('#when success case without multiple, update first element with price 20, change it to 30', function () {
 			var counter = _(db.fruits).update({price: 20}, {$set: {price: 30}, $unset: {redundantField: 1}});
 			it('#should update 1 document', function () {
@@ -55,7 +58,7 @@ describe('mongo-query utility belt test', function () {
 		});
 
 		describe('#when success case with multiple. Changing all prices with 20 to 30', function () {
-			var counter = _(db.fruits).update({price: 20}, {$set: {price: 30}}, { multi: true });
+			var counter = _(db.fruits).update({price: 20}, {$set: {price: 30}}, {multi: true});
 			it('#should update 2 documents', function () {
 				counter.should.equal(2);
 			});
@@ -91,11 +94,9 @@ describe('mongo-query utility belt test', function () {
 		});
 
 		describe('#testing array modifiers', function () {
-
 			describe('#testing $push modifier', function () {
-
 				describe('#without $each', function () {
-					_(db.beverages).update({name: 'Pepsi'}, {$push: {'suppliers': 'six'}});
+					_(db.beverages).update({name: 'Pepsi'}, {$push: {suppliers: 'six'}});
 
 					var beverage = _(db.beverages).findOne({name: 'Pepsi'});
 
@@ -105,7 +106,10 @@ describe('mongo-query utility belt test', function () {
 				});
 
 				describe('#with $each modifier', function () {
-					_(db.beverages).update({name: 'MongoCola'}, {$push: {'suppliers': {$each: ['seven', 'eight', 'nine']}}});
+					_(db.beverages).update(
+						{name: 'MongoCola'},
+						{$push: {suppliers: {$each: ['seven', 'eight', 'nine']}}}
+					);
 					var beverage = _(db.beverages).findOne({name: 'MongoCola'});
 
 					it('should have suppliers field length === 9', function () {
@@ -132,14 +136,16 @@ describe('mongo-query utility belt test', function () {
 				});
 
 				describe('#when adding $each modifier', function () {
-					_(db.beverages).update({name: 'ZeroVatkaCola'}, {$addToSet: {suppliers: {$each: ['one', 'four', 'five']}}});
+					_(db.beverages).update(
+						{name: 'ZeroVatkaCola'},
+						{$addToSet: {suppliers: {$each: ['one', 'four', 'five']}}}
+					);
 					var beverage = _(db.beverages).findOne({name: 'ZeroVatkaCola'});
 
 					it('#should insert 2 values and dont insert 1', function () {
 						beverage.suppliers.should.have.length(5);
 					});
 				});
-
 			});
 
 			describe('#testing $pull modifier', function () {
@@ -169,7 +175,10 @@ describe('mongo-query utility belt test', function () {
 			});
 
 			describe('#testing string based deep modifiers when array with deep nesting', function () {
-				_(db.beverages).update({name: 'ZeroVatkaCola'}, {$set: {'nestedObjectsArray.0.someProperty': 'value modified'}});
+				_(db.beverages).update(
+					{name: 'ZeroVatkaCola'},
+					{$set: {'nestedObjectsArray.0.someProperty': 'value modified'}}
+				);
 
 				it('#should properly set up first item', function () {
 					var doc = _(db.beverages).findOne({name: 'ZeroVatkaCola'});
@@ -203,7 +212,11 @@ describe('mongo-query utility belt test', function () {
 		});
 
 		describe('#when its not found and upsert true', function () {
-			var beverage = _(db.beverages).findAndModify({name: 'someRandomBeverage'}, {price: 100, name: "someRandomFruit"}, {upsert: true});
+			var beverage = _(db.beverages).findAndModify(
+				{name: 'someRandomBeverage'},
+				{price: 100, name: 'someRandomFruit'},
+				{upsert: true}
+			);
 			it('#should return new object', function () {
 				beverage.should.have.property('price', 100);
 				beverage.should.have.property('name', 'someRandomFruit');
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..862770a
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,18 @@
+{
+	"compilerOptions": {
+		"target": "ES6",
+		"module": "commonjs",
+		"declaration": true,
+		"declarationMap": true,
+		"outDir": "./dist",
+		"strict": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"noFallthroughCasesInSwitch": true,
+		"noImplicitReturns": true,
+		"sourceMap": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true
+	},
+	"exclude": ["node_modules", "test/**", "node", "web", "dist"]
+}
diff --git a/util/index.js b/util/index.js
index 69a17e9..5730716 100644
--- a/util/index.js
+++ b/util/index.js
@@ -11,21 +11,21 @@ var checkArrayPresence = function (doc, key, modifier) {
 };
 
 var modifiers = {
-	'$set': function (doc, modifier) {
+	$set: function (doc, modifier) {
 		Object.keys(modifier).forEach(function (key) {
 			objectUtil.setProp(key)(doc, modifier[key]);
 		});
 		return doc;
 	},
 
-	'$unset': function (doc, modifier) {
+	$unset: function (doc, modifier) {
 		Object.keys(modifier).forEach(function (key) {
 			objectUtil.deleteProp(doc, key);
 		});
 		return doc;
 	},
 
-	'$addToSet': function (doc, modifier) {
+	$addToSet: function (doc, modifier) {
 		Object.keys(modifier).forEach(function (key) {
 			var docProperty = objectUtil.prop(key)(doc);
 			if (!docProperty instanceof Array) {
@@ -36,7 +36,6 @@ var modifiers = {
 
 			if (modifierProperty.$each && modifierProperty.$each instanceof Array) {
 				modifierProperty.$each.forEach(function (modifierItem) {
-
 					var mod = {};
 					objectUtil.setProp(key)(mod, modifierItem);
 					isPresent = checkArrayPresence(doc, key, mod);
@@ -45,8 +44,7 @@ var modifiers = {
 						docProperty.push(modifierItem);
 					}
 				});
-			}
-			else {
+			} else {
 				isPresent = checkArrayPresence(doc, key, modifier);
 				if (!isPresent) {
 					docProperty.push(modifierProperty);
@@ -54,10 +52,9 @@ var modifiers = {
 			}
 		});
 		return doc;
-
 	},
 
-	'$inc': function (doc, modifier) {
+	$inc: function (doc, modifier) {
 		Object.keys(modifier).forEach(function (key) {
 			var docProp = objectUtil.prop(key)(doc);
 			var modifierValue = modifier[key];
@@ -66,7 +63,7 @@ var modifiers = {
 		return doc;
 	},
 
-	'$rename': function (doc, modifier) {
+	$rename: function (doc, modifier) {
 		Object.keys(modifier).forEach(function (key) {
 			var newPropertyKey = objectUtil.prop(key)(modifier);
 			objectUtil.renameProp(doc, key, newPropertyKey);
@@ -80,14 +77,12 @@ var modifiers = {
 			var modifierValue = modifier[key];
 
 			if (!property instanceof Array) {
-				throw "property " + key + " is not array";
+				throw 'property ' + key + ' is not array';
 			}
 
 			if (modifierValue == 1) {
 				property.pop();
-			}
-
-			else if (modifierValue == -1) {
+			} else if (modifierValue == -1) {
 				property.shift();
 			}
 		});
@@ -101,15 +96,14 @@ var modifiers = {
 			var modifierProperty = modifier[key];
 
 			if (!property instanceof Array) {
-				throw "property " + key + " is not array";
+				throw 'property ' + key + ' is not array';
 			}
 
 			if (modifierProperty.$each && modifierProperty.$each instanceof Array) {
 				modifierProperty.$each.forEach(function (modifierItem) {
 					property.push(modifierItem);
 				});
-			}
-			else {
+			} else {
 				property.push(modifierProperty);
 			}
 		});
@@ -123,7 +117,7 @@ var modifiers = {
 			var modifierProperty = modifier[key];
 
 			if (!property instanceof Array) {
-				throw "property " + key + "is not array";
+				throw 'property ' + key + 'is not array';
 			}
 
 			var subCollection = new Wrap(property.slice());
@@ -132,28 +126,28 @@ var modifiers = {
 		});
 
 		return doc;
-	}
+	},
 };
 
 var comparsionOperators = {
-	'$gt': function (doc, field, value) {
+	$gt: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return property > value;
 	},
-	'$gte': function (doc, field, value) {
+	$gte: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return property >= value;
 	},
-	'$lt': function (doc, field, value) {
+	$lt: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return property < value;
 	},
-	'$lte': function (doc, field, value) {
+	$lte: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return property <= value;
 	},
 
-	'$in': function (doc, field, value) {
+	$in: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		if (!value instanceof Array) {
 			throw 'should set an array for $in call';
@@ -164,8 +158,7 @@ var comparsionOperators = {
 					return docFieldItem == valueFieldItem;
 				});
 			});
-		}
-		else {
+		} else {
 			return value.some(function (valueItem) {
 				return property == valueItem;
 			});
@@ -174,17 +167,17 @@ var comparsionOperators = {
 	$nin: function (doc, field, value) {
 		return !this.$in(doc, field, value);
 	},
-	'$regex': function (doc, field, value) {
+	$regex: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return value.test(property);
 	},
 
-	'$ne': function (doc, field, value) {
+	$ne: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return property != value;
 	},
 
-	'$exists': function (doc, field, value) {
+	$exists: function (doc, field, value) {
 		var property = objectUtil.prop(field)(doc);
 		return (property !== undefined) === value; //null values does not include
 	},
@@ -217,9 +210,7 @@ var comparsionOperators = {
 			});
 		}
 		return false;
-	}
-
-
+	},
 };
 
 var logicalOperators = {
@@ -241,8 +232,7 @@ var logicalOperators = {
 
 	$nor: function (doc, array) {
 		return !this.$and(doc, array);
-	}
-
+	},
 };
 //todo:wtf
 function areEqual(field1, field2) {
@@ -267,8 +257,7 @@ function _updateDoc(doc, modifier, wrapped) {
 	Object.keys(modifier).forEach(function (key) {
 		if (!modifiers[key]) {
 			throw 'this modifier is not supported for now or invalid: ' + key;
-		}
-		else {
+		} else {
 			var modifierValue = modifier[key];
 			var modifiedDoc = modifiers[key](doc, modifierValue);
 			var index = wrapped._data.indexOf(doc);
@@ -278,7 +267,6 @@ function _updateDoc(doc, modifier, wrapped) {
 	return;
 }
 
-
 function Wrap(array) {
 	this._data = array;
 	return this;
@@ -289,7 +277,6 @@ function Constructor(array) {
 }
 
 function _allKeysValid(query, item) {
-
 	if (typeof query !== 'object') {
 		return query === item;
 	}
@@ -300,7 +287,7 @@ function _allKeysValid(query, item) {
 
 	function anyMatchOf(key, pathStep, item) {
 		return item[pathStep].some(function (subArrayItem) {
-			var subQueryKey = key.replace(new RegExp(pathStep + '\\.'), "");
+			var subQueryKey = key.replace(new RegExp(pathStep + '\\.'), '');
 			var subQuery = {};
 			subQuery[subQueryKey] = query[key];
 
@@ -308,7 +295,6 @@ function _allKeysValid(query, item) {
 		});
 	}
 
-
 	return Object.keys(query).every(function (key) {
 		if (logicalOperators[key]) {
 			return logicalOperators[key](item, query[key]);
@@ -317,26 +303,23 @@ function _allKeysValid(query, item) {
 		else if (typeof query[key] == 'object') {
 			//Add filter by strict date matching
 			if (query[key] instanceof Date) {
-				return item[key] instanceof Date && query[key].getTime()===item[key].getTime();
+				return item[key] instanceof Date && query[key].getTime() === item[key].getTime();
 			}
 			return Object.keys(query[key]).every(function (operator) {
 				return comparsionOperators[operator](item, key, query[key][operator]);
 			});
-		}
-		else if (typeof key === 'string' && new RegExp('.*\\..*').test(key)) {
+		} else if (typeof key === 'string' && new RegExp('.*\\..*').test(key)) {
 			var properties = key.split('.');
 			var path = [];
 
-
 			for (var i = 0; i < properties.length; i++) {
 				var property = properties[i];
 				path.push(property);
-				var pathStep = path.join(".");
+				var pathStep = path.join('.');
 				if (item[pathStep] instanceof Array) {
 					var nextOperator = parseInt(properties[i + 1]);
 					if (!isNaN(nextOperator)) {
-
-						var subQueryKey = key.replace(new RegExp(pathStep + '\\.' + properties[i + 1] + '\\.'), "");
+						var subQueryKey = key.replace(new RegExp(pathStep + '\\.' + properties[i + 1] + '\\.'), '');
 						var subQuery = {};
 						subQuery[subQueryKey] = query[key];
 						var subArrayItem = item[pathStep][properties[i + 1]];
@@ -355,7 +338,6 @@ function _allKeysValid(query, item) {
 }
 
 Wrap.prototype.find = function (query, options) {
-
 	options = options || {};
 
 	var filteredArray = this._data.filter(function (item) {
@@ -394,8 +376,7 @@ Wrap.prototype.update = function (query, modifier, options) {
 			_updateDoc(doc, modifier, self);
 			counter++;
 		});
-	}
-	else {
+	} else {
 		var doc = this.findOne(query);
 		if (doc) {
 			counter++;
@@ -442,15 +423,13 @@ Wrap.prototype.findAndModify = function (query, modifier, options) {
 	if (doc) {
 		if (options.new) {
 			_updateDoc(doc, modifier, this);
-		}
-		else {
+		} else {
 			_updateDoc(JSON.parse(JSON.stringify(doc)), modifier, this);
 		}
-	}
-	else if (!modifier.$set && options.upsert) {
+	} else if (!modifier.$set && options.upsert) {
 		doc = this.insert(modifier);
 	}
 	return doc;
 };
 
-module.exports = Constructor;
\ No newline at end of file
+module.exports = Constructor;
diff --git a/util/objectUtil.js b/util/objectUtil.js
index 97b3045..c7ab087 100644
--- a/util/objectUtil.js
+++ b/util/objectUtil.js
@@ -16,7 +16,7 @@ function prop(name) {
 			} else {
 				property = property[propertiesArray[i]];
 
-				if (typeof(property) === 'undefined') {
+				if (typeof property === 'undefined') {
 					return;
 				}
 
@@ -41,7 +41,7 @@ function setProp(name) {
 		}
 		var property = object;
 		for (var i = 0; i < propertiesArray.length - 1; i++) {
-			if (typeof(property[propertiesArray[i]]) === 'undefined') {
+			if (typeof property[propertiesArray[i]] === 'undefined') {
 				property[propertiesArray[i]] = {};
 			}
 			property = property[propertiesArray[i]];
@@ -106,5 +106,5 @@ module.exports = {
 	deleteProp: deleteProp,
 	addArrayItemsPropIfNotExist: addArrayItemsPropIfNotExist,
 	renameArrayItemsProp: renameArrayItemsProp,
-	deleteArrayItemsProp: deleteArrayItemsProp
-};
\ No newline at end of file
+	deleteArrayItemsProp: deleteArrayItemsProp,
+};