diff --git a/.scrutinizer.yml b/.scrutinizer.yml
new file mode 100644
index 0000000..5e16797
--- /dev/null
+++ b/.scrutinizer.yml
@@ -0,0 +1,35 @@
+checks:
+  php:
+    code_rating: true
+    duplication: true
+
+filter:
+  excluded_paths:
+    - tests/*
+
+build:
+  nodes:
+    php71:
+      environment:
+        php:
+          version: 7.1.12
+      tests:
+        override:
+          - php-scrutinizer-run
+          -
+            command: vendor/bin/phpunit --coverage-clover=coverage71
+            coverage:
+              file: coverage71
+              format: php-clover
+    php72:
+      environment:
+        php:
+          version: 7.2.0
+      tests:
+        override:
+          - php-scrutinizer-run
+          -
+            command: vendor/bin/phpunit --coverage-clover=coverage72
+            coverage:
+              file: coverage72
+              format: php-clover
\ No newline at end of file
diff --git a/README.md b/README.md
index 405078d..f7c7ea7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Eloquent Versioning
 
-[![Latest Stable Version](https://poser.pugx.org/proai/eloquent-versioning/v/stable)](https://packagist.org/packages/proai/eloquent-versioning) [![Total Downloads](https://poser.pugx.org/proai/eloquent-versioning/downloads)](https://packagist.org/packages/proai/eloquent-versioning) [![Latest Unstable Version](https://poser.pugx.org/proai/eloquent-versioning/v/unstable)](https://packagist.org/packages/proai/eloquent-versioning) [![License](https://poser.pugx.org/proai/eloquent-versioning/license)](https://packagist.org/packages/proai/eloquent-versioning)
+[![Build status](https://scrutinizer-ci.com/g/ProAI/eloquent-versioning/badges/build.png?b=master)](https://scrutinizer-ci.com/g/ProAI/eloquent-versioning/) [![Quality score](https://scrutinizer-ci.com/g/ProAI/eloquent-versioning/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/ProAI/eloquent-versioning/) [![Latest Stable Version](https://poser.pugx.org/proai/eloquent-versioning/v/stable)](https://packagist.org/packages/proai/eloquent-versioning) [![Total Downloads](https://poser.pugx.org/proai/eloquent-versioning/downloads)](https://packagist.org/packages/proai/eloquent-versioning) [![Latest Unstable Version](https://poser.pugx.org/proai/eloquent-versioning/v/unstable)](https://packagist.org/packages/proai/eloquent-versioning) [![License](https://poser.pugx.org/proai/eloquent-versioning/license)](https://packagist.org/packages/proai/eloquent-versioning)
 
 This is an extension for the Eloquent ORM to support versioning. You can specify attributes as versioned. If an attribute is specified as versioned the value will be saved in a separate version table on each update. It is possible to use timestamps and soft deletes with this feature.
 
@@ -29,12 +29,14 @@ Schema::create('users', function(Blueprint $table) {
 });
 
 Schema::create('users_version', function(Blueprint $table) {
-    $table->integer('ref_id')->primary();
-    $table->integer('version')->primary();
+    $table->integer('ref_id')->unsigned();
+    $table->integer('version')->unsigned();
     $table->string('email');
     $table->string('city');
     $table->timestamp('updated_at');
     $table->timestamp('deleted_at');
+    
+    $table->primary(['ref_id', 'version']);
 });
 
 ...
@@ -90,7 +92,7 @@ By default the query builder will fetch the latest version (e. g. `User::find(1)
 
 * `allVersions()` returns all versions of the queried items<br>Example: `User::allVersions()->get()` will return all versions of all users
 
-* `moment(Carbon)` returns a specific version, closest but lower than the input date<br>Example: `User::moment(Carbon::now()->subWeek()->find(1)` will return the version at that point in time.
+* `moment(Carbon)` returns a specific version, closest but lower than the input date<br>Example: `User::moment(Carbon::now()->subWeek())->find(1)` will return the version at that point in time.
 
 #### Create, update and delete records
 
diff --git a/tests/TestCase.php b/tests/TestCase.php
index f89c0dc..d1ee87c 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -2,7 +2,6 @@
 
 namespace ProAI\Versioning\Tests;
 
-use Orchestra\Database\ConsoleServiceProvider;
 use Orchestra\Testbench\TestCase as BaseTestCase;
 
 class TestCase extends BaseTestCase