diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2376edb..848daa1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,9 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Removed
 
-- Nothing.
+- [#68](https://github.com/zendframework/zend-servicemanager/pull/68) removes
+  the dependency on zend-stdlib by inlining the `ArrayUtils::merge()` routine
+  as a private method of `Zend\ServiceManager\Config`.
 
 ### Fixed
 
diff --git a/composer.json b/composer.json
index 099bbd16..1261f5e9 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,8 @@
         "athletic/athletic": "dev-master"
     },
     "suggest": {
-        "ocramius/proxy-manager": "ProxyManager 1.* to handle lazy initialization of services"
+        "ocramius/proxy-manager": "ProxyManager 1.* to handle lazy initialization of services",
+        "zendframework/zend-stdlib": "zend-stdlib ^2.5 if you wish to use the MergeReplaceKey or MergeRemoveKey features in Config instances"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,
diff --git a/src/Config.php b/src/Config.php
index c6fb50f7..9db30a8a 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -9,25 +9,39 @@
 
 namespace Zend\ServiceManager;
 
-use Zend\Stdlib\ArrayUtils;
+use Zend\Stdlib\ArrayUtils\MergeRemoveKey;
+use Zend\Stdlib\ArrayUtils\MergeReplaceKeyInterface;
 
+/**
+ * Object for defining configuration and configuring an existing service manager instance.
+ *
+ * In order to provide configuration merging capabilities, this class implements
+ * the same functionality as `Zend\Stdlib\ArrayUtils::merge()`. That routine
+ * allows developers to specifically shape how values are merged:
+ *
+ * - A value which is an instance of `MergeRemoveKey` indicates the value should
+ *   be removed during merge.
+ * - A value that is an instance of `MergeReplaceKeyInterface` indicates that the
+ *   value it contains should be used to replace any previous versions.
+ *
+ * These features are advanced, and not typically used. If you wish to use them,
+ * you will need to require the zend-stdlib package in your application.
+ */
 class Config implements ConfigInterface
 {
     /**
-     * Allowed configuration keys
-     *
      * @var array
      */
-    protected $allowedKeys = [
+    private $allowedKeys = [
         'abstract_factories' => true,
-        'aliases'            => true,
-        'delegators'         => true,
-        'factories'          => true,
-        'initializers'       => true,
-        'invokables'         => true,
-        'lazy_services'      => true,
-        'services'           => true,
-        'shared'             => true,
+        'aliases' => true,
+        'delegators' => true,
+        'factories' => true,
+        'initializers' => true,
+        'invokables' => true,
+        'lazy_services' => true,
+        'services' => true,
+        'shared' => true,
     ];
 
     /**
@@ -46,8 +60,6 @@ class Config implements ConfigInterface
     ];
 
     /**
-     * Constructor
-     *
      * @param array $config
      */
     public function __construct(array $config = [])
@@ -58,15 +70,11 @@ public function __construct(array $config = [])
                 unset($config[$key]);
             }
         }
-
-        $this->config = ArrayUtils::merge($this->config, $config);
+        $this->config = $this->merge($this->config, $config);
     }
 
     /**
-     * Configure service manager
-     *
-     * @param ServiceManager $serviceManager
-     * @return ServiceManager Returns the updated service manager instance.
+     * @inheritdoc
      */
     public function configureServiceManager(ServiceManager $serviceManager)
     {
@@ -80,4 +88,34 @@ public function toArray()
     {
         return $this->config;
     }
+
+    /**
+     * Copy paste from https://github.com/zendframework/zend-stdlib/commit/26fcc32a358aa08de35625736095cb2fdaced090
+     * to keep compatibility with previous version
+     *
+     * @link https://github.com/zendframework/zend-servicemanager/pull/68
+     */
+    private function merge(array $a, array $b)
+    {
+        foreach ($b as $key => $value) {
+            if ($value instanceof MergeReplaceKeyInterface) {
+                $a[$key] = $value->getData();
+            } elseif (isset($a[$key]) || array_key_exists($key, $a)) {
+                if ($value instanceof MergeRemoveKey) {
+                    unset($a[$key]);
+                } elseif (is_int($key)) {
+                    $a[] = $value;
+                } elseif (is_array($value) && is_array($a[$key])) {
+                    $a[$key] = $this->merge($a[$key], $value);
+                } else {
+                    $a[$key] = $value;
+                }
+            } else {
+                if (!$value instanceof MergeRemoveKey) {
+                    $a[$key] = $value;
+                }
+            }
+        }
+        return $a;
+    }
 }
diff --git a/test/ConfigTest.php b/test/ConfigTest.php
index 131b5247..b1492334 100644
--- a/test/ConfigTest.php
+++ b/test/ConfigTest.php
@@ -18,6 +18,44 @@
  */
 class ConfigTest extends TestCase
 {
+    public function testMergeArrays()
+    {
+        $config = [
+            'invokables' => [
+                'foo' => TestAsset\InvokableObject::class,
+            ],
+            'delegators' => [
+                'foo' => [
+                    TestAsset\PreDelegator::class,
+                ]
+            ],
+            'factories' => [
+                'service' => TestAsset\FactoryObject::class,
+            ],
+        ];
+
+        $configuration = new TestAsset\ExtendedConfig($config);
+        $result = $configuration->toArray();
+
+        $expected = [
+            'invokables' => [
+                'foo' => TestAsset\InvokableObject::class,
+                TestAsset\InvokableObject::class => TestAsset\InvokableObject::class,
+            ],
+            'delegators' => [
+                'foo' => [
+                    TestAsset\InvokableObject::class,
+                    TestAsset\PreDelegator::class,
+                ],
+            ],
+            'factories' => [
+                'service' => TestAsset\FactoryObject::class,
+            ],
+        ];
+
+        $this->assertEquals($expected, $result);
+    }
+
     public function testPassesKnownServiceConfigKeysToServiceManagerWithConfigMethod()
     {
         $expected = [
diff --git a/test/TestAsset/ExtendedConfig.php b/test/TestAsset/ExtendedConfig.php
new file mode 100644
index 00000000..b3bf172d
--- /dev/null
+++ b/test/TestAsset/ExtendedConfig.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace ZendTest\ServiceManager\TestAsset;
+
+use Zend\ServiceManager\Config;
+
+class ExtendedConfig extends Config
+{
+    protected $config = [
+        'invokables' => [
+            InvokableObject::class => InvokableObject::class,
+        ],
+        'delegators' => [
+            'foo' => [
+                InvokableObject::class,
+            ],
+        ],
+    ];
+}