diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ff5dd0ba..324eb7318 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# v1.6.0-beta.4
+## mm/dd/2018
+
+1. [](#improved)
+    * Added apcu autoloader optimization
+    
 # v1.6.0-beta.3
 ## 10/15/2018
 
diff --git a/composer.json b/composer.json
index c5dc10538..c194d2ca4 100644
--- a/composer.json
+++ b/composer.json
@@ -53,6 +53,7 @@
         "victorjonsson/markdowndocs": "dev-master"
     },
     "config": {
+        "apcu-autoloader": true,
         "platform": {
             "php": "7.1.3"
         }
diff --git a/system/defines.php b/system/defines.php
index e9264937e..bf375371a 100644
--- a/system/defines.php
+++ b/system/defines.php
@@ -8,7 +8,7 @@
 
 // Some standard defines
 define('GRAV', true);
-define('GRAV_VERSION', '1.6.0-beta.3');
+define('GRAV_VERSION', '1.6.0-beta.4');
 define('GRAV_TESTING', true);
 define('DS', '/');