diff --git a/comet-cache-pro.php b/comet-cache-pro.php
index 5f81e344..16851264 100644
--- a/comet-cache-pro.php
+++ b/comet-cache-pro.php
@@ -1,6 +1,6 @@
 <?php
 /*
-Version: 160223
+Version: 160223.1
 Text Domain: comet-cache
 Plugin Name: Comet Cache Pro
 Network: true
diff --git a/readme.txt b/readme.txt
index 8f278412..a5915258 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,6 +1,6 @@
 === Comet Cache ===
 
-Stable tag: 160223
+Stable tag: 160223.1
 Requires at least: 4.1
 Tested up to: 4.5-alpha
 Text Domain: comet-cache
@@ -336,6 +336,10 @@ Requires PHP v5.4+. The latest version of Comet Cache is a complete rewrite (OOP
 
 == Changelog ==
 
+= v160223.1 =
+
+- **Bug Fix**: Fixes PHP Fatal Error when upgrading from Comet Cache v160211.
+
 = v160223 =
 
 - **Announcement: After March 1st, 2016 Comet Cache will require PHP Multibyte String support.** The `mbstring` extension provides Multibyte String support to PHP and is required to properly handle UTF-8 characters, which many sites now use. Without Multibyte String support, caching will be unstable. For that reason we are requiring the `mbstring` extension to improve reliability when caching and to prevent your site from experiencing unforeseen issues in the future..
diff --git a/src/includes/stub.php b/src/includes/stub.php
index 86d3da65..42917036 100644
--- a/src/includes/stub.php
+++ b/src/includes/stub.php
@@ -12,7 +12,7 @@
 require_once dirname(dirname(__FILE__)).'/vendor/autoload.php';
 require_once dirname(__FILE__).'/functions/i18n-utils.php';
 
-${__FILE__}['version'] = '160223'; //version//
+${__FILE__}['version'] = '160223.1'; //version//
 ${__FILE__}['plugin']  = dirname(dirname(dirname(__FILE__)));
 ${__FILE__}['plugin'] .= '/'.basename(${__FILE__}['plugin']).'.php';
 ${__FILE__}['ns_path'] = str_replace('\\', '/', __NAMESPACE__); // To dir/path.
@@ -28,3 +28,11 @@
 define(__NAMESPACE__.'\\IS_PRO', ${__FILE__}['is_pro']);
 
 unset(${__FILE__}); // Housekeeping.
+
+// Fixes PHP Fatal error with upgrades from v160211
+class_alias(__NAMESPACE__.'\\AdvCacheBackCompat', 'WebSharks\\Comet_Cache\\AdvCacheBackCompat');
+class_alias(__NAMESPACE__.'\\AdvancedCache', 'WebSharks\\Comet_Cache\\AdvancedCache');
+/*[pro strip-from="lite"]*/
+class_alias(__NAMESPACE__.'\\AdvCacheBackCompat', 'WebSharks\\Comet_Cache\\Pro\\AdvCacheBackCompat');
+class_alias(__NAMESPACE__.'\\AdvancedCache', 'WebSharks\\Comet_Cache\\Pro\\AdvancedCache');
+/*[/pro]*/
diff --git a/src/includes/translations/comet-cache-pro.pot b/src/includes/translations/comet-cache-pro.pot
index ac009268..c5c60394 100644
--- a/src/includes/translations/comet-cache-pro.pot
+++ b/src/includes/translations/comet-cache-pro.pot
@@ -2,9 +2,9 @@
 # This file is distributed under the same license as the Comet Cache Pro package.
 msgid ""
 msgstr ""
-"Project-Id-Version: Comet Cache Pro 160223\n"
+"Project-Id-Version: Comet Cache Pro 160223.1\n"
 "Report-Msgid-Bugs-To: http://wordpress.org/tag/comet-cache-pro\n"
-"POT-Creation-Date: 2016-02-22 16:41:17+00:00\n"
+"POT-Creation-Date: 2016-02-22 18:02:54+00:00\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"