diff --git a/CHANGELOG b/CHANGELOG
index 8f558cef1..b75a34778 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-* 1.5.0
+* 1.5.0-RC1 (2011-12-26)
 
  * removed the need to quote hash keys
  * allowed hash keys to be any expression
diff --git a/ext/twig/php_twig.h b/ext/twig/php_twig.h
index b63f26cfd..fb9202f54 100644
--- a/ext/twig/php_twig.h
+++ b/ext/twig/php_twig.h
@@ -15,7 +15,7 @@
 #ifndef PHP_TWIG_H
 #define PHP_TWIG_H
 
-#define PHP_TWIG_VERSION "1.5.0-DEV"
+#define PHP_TWIG_VERSION "1.5.0-RC1"
 
 #include "php.h"
 
diff --git a/lib/Twig/Environment.php b/lib/Twig/Environment.php
index ac6c914e7..016242f81 100644
--- a/lib/Twig/Environment.php
+++ b/lib/Twig/Environment.php
@@ -17,7 +17,7 @@
  */
 class Twig_Environment
 {
-    const VERSION = '1.5.0-DEV';
+    const VERSION = '1.5.0-RC1';
 
     protected $charset;
     protected $loader;