diff --git a/core/core.go b/core/core.go
index 93ca2d9c..dabdee9d 100644
--- a/core/core.go
+++ b/core/core.go
@@ -19,7 +19,7 @@ import (
 var (
 	Version_x byte = 24
 	Version_y byte = 11
-	Version_z byte = 11
+	Version_z byte = 21
 )
 
 var (