diff --git a/composer.json b/composer.json
index 8bbd638..ad1c730 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,6 @@
         "php": "^7.1.3",
         "symfony/expression-language": "^4.1",
         "psr/log": "^1.0",
-        "doctrine/collections": "^1.5",
         "dusank/knapsack": "^10.0"
     },
     "require-dev": {
diff --git a/composer.lock b/composer.lock
index a5bd1f1..f5b65c6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,75 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "492a2af4f32227b2157929118fbbe541",
+    "content-hash": "fe1963ed64aab0076a092eb85b5f393d",
     "packages": [
-        {
-            "name": "doctrine/collections",
-            "version": "v1.5.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/doctrine/collections.git",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/collections/zipball/a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.1"
-            },
-            "require-dev": {
-                "doctrine/coding-standard": "~0.1@dev",
-                "phpunit/phpunit": "^5.7"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.3.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-0": {
-                    "Doctrine\\Common\\Collections\\": "lib/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Roman Borschel",
-                    "email": "roman@code-factory.org"
-                },
-                {
-                    "name": "Benjamin Eberlei",
-                    "email": "kontakt@beberlei.de"
-                },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
-                {
-                    "name": "Jonathan Wage",
-                    "email": "jonwage@gmail.com"
-                },
-                {
-                    "name": "Johannes Schmitt",
-                    "email": "schmittjoh@gmail.com"
-                }
-            ],
-            "description": "Collections Abstraction library",
-            "homepage": "http://www.doctrine-project.org",
-            "keywords": [
-                "array",
-                "collections",
-                "iterator"
-            ],
-            "time": "2017-07-22T10:37:32+00:00"
-        },
         {
             "name": "dusank/knapsack",
             "version": "10.0.0",
diff --git a/src/Engine/ExecutionPath.php b/src/Engine/ExecutionPath.php
index ad442a1..93d0552 100644
--- a/src/Engine/ExecutionPath.php
+++ b/src/Engine/ExecutionPath.php
@@ -2,15 +2,13 @@
 
 namespace Phlow\Engine;
 
-use Doctrine\Common\Collections\ArrayCollection;
-use Doctrine\Common\Collections\Collection;
 use Phlow\Model\WorkflowObject;
 use Traversable;
 
 class ExecutionPath implements \IteratorAggregate, \Countable
 {
     /**
-     * @var Collection Sequence of Workflow Connectors and Nodes
+     * @var array Sequence of Workflow Connectors and Nodes
      */
     private $sequence;
 
@@ -19,7 +17,7 @@ class ExecutionPath implements \IteratorAggregate, \Countable
      */
     public function __construct()
     {
-        $this->sequence = new ArrayCollection();
+        $this->sequence = [];
     }
 
     /**
@@ -29,7 +27,7 @@ public function __construct()
      */
     public function add(WorkflowObject $element)
     {
-        $this->sequence->add($element);
+        array_push($this->sequence, $element);
     }
 
     /**
@@ -41,7 +39,7 @@ public function add(WorkflowObject $element)
      */
     public function getIterator()
     {
-        return $this->sequence->getIterator();
+        return new \ArrayIterator($this->sequence);
     }
 
     /**
@@ -55,7 +53,7 @@ public function getIterator()
      */
     public function count()
     {
-        return $this->sequence->count();
+        return count($this->sequence);
     }
 
     /**
@@ -65,6 +63,6 @@ public function count()
      */
     public function contains(WorkflowObject $workflowObject)
     {
-        return $this->sequence->contains($workflowObject);
+        return in_array($workflowObject, $this->sequence, true);
     }
 }