diff --git a/php_yaf.h b/php_yaf.h
index 10a8ee2d..98775d2b 100644
--- a/php_yaf.h
+++ b/php_yaf.h
@@ -41,7 +41,7 @@ extern zend_module_entry yaf_module_entry;
 #define YAF_G(v) (yaf_globals.v)
 #endif
 
-#define PHP_YAF_VERSION 					"2.3.0"
+#define PHP_YAF_VERSION 					"2.3.1-dev"
 
 #define YAF_STARTUP_FUNCTION(module)   	ZEND_MINIT_FUNCTION(yaf_##module)
 #define YAF_RINIT_FUNCTION(module)		ZEND_RINIT_FUNCTION(yaf_##module)