diff --git a/core/core.go b/core/core.go
index 4e512118..d7555674 100644
--- a/core/core.go
+++ b/core/core.go
@@ -18,8 +18,8 @@ import (
 
 var (
 	Version_x byte = 25
-	Version_y byte = 3
-	Version_z byte = 31
+	Version_y byte = 4
+	Version_z byte = 30
 )
 
 var (