diff --git a/version.go b/version.go
index d4b7f3151..edb9d6149 100644
--- a/version.go
+++ b/version.go
@@ -1,4 +1,4 @@
 package gf
 
-const VERSION = "v2.1.0-rc3"
+const VERSION = "v2.1.0-rc4"
 const AUTHORS = "john<john@goframe.org>"