diff --git a/package.json b/package.json
index eb6f0ef..dfa8dd0 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "Validate JSON objects with TypeScript-like interface specifications.",
   "main": "lib/interface-validator.js",
   "scripts": {
+    "pretest": "tsc",
     "test": "mocha",
     "prepublish": "tsc"
   },
@@ -23,14 +24,14 @@
   },
   "homepage": "https://github.com/hanlindev/interface-validator#readme",
   "dependencies": {
-    "@types/lodash": "^4.14.62",
+    "@types/lodash": "^4.14.95",
     "lodash": "^4.17.4"
   },
   "devDependencies": {
-    "@types/chai": "^3.4.35",
-    "@types/mocha": "^2.2.40",
+    "@types/chai": "^3.5.2",
+    "@types/mocha": "^2.2.47",
     "chai": "^3.5.0",
-    "mocha": "^3.2.0"
+    "mocha": "^3.5.3"
   },
   "types": "./lib/interface-validator.d.ts"
 }
diff --git a/src/interface-validator.ts b/src/interface-validator.ts
index 846dc0a..b54cdb6 100644
--- a/src/interface-validator.ts
+++ b/src/interface-validator.ts
@@ -24,7 +24,7 @@ export type PrimitiveTypes =
   'string!' | 'string' 
   | 'number' | 'number!'
   | 'boolean' | 'boolean!'
-  | 'object';
+  | 'object' | object[];
 
 /**
  * The key must be a valid variable name with an optional trailing question
@@ -58,6 +58,15 @@ export function getMismatchedFields(
       return (isOptional) ? [] : [valueKey];
     }
 
+    if (_.isArray(fieldSpecs[specName])) {
+      return values[valueKey].map((arrayValue, index) => {
+        return getMismatchedFields(
+          arrayValue,
+          fieldSpecs[specName][0] as Interface,
+        ).map((name) => `${valueKey}[${index}].${name}`);
+      }).filter((e) => e.length > 0)
+    }
+
     return getMismatchedFields(
       values[valueKey],
       fieldSpecs[specName] as Interface,
diff --git a/src/test/test-interface-validator.ts b/src/test/test-interface-validator.ts
index 32b4759..931a729 100644
--- a/src/test/test-interface-validator.ts
+++ b/src/test/test-interface-validator.ts
@@ -16,6 +16,12 @@ describe('interface-validator getMismatchedFields', () => {
         },
         string: 'nested str',
       },
+      objectArray: [{
+        string: 'str',
+        number: 0,
+      },{
+        string: 'str'
+      }],
       castToNumber: '123',
       castToNumberFail: 'one',
       castToBoolean: 'true',
@@ -131,4 +137,18 @@ describe('interface-validator getMismatchedFields', () => {
       expect(getMismatchedFields(tested, subSpecs)).to.be.empty;
     });
   });
+
+  describe('nested array interface', () => {
+    const specs: Interface = {
+      number: 'number',
+      objectArray: [{
+        string: 'string',
+        'number?': 'number'
+      }]
+    };
+
+    it('returns empty array when all matched', () => {
+      expect(getMismatchedFields(tested, specs)).to.be.empty;
+    })
+  });
 });
\ No newline at end of file