diff --git a/core/core.go b/core/core.go
index 6a59531b2..805cc8c4f 100644
--- a/core/core.go
+++ b/core/core.go
@@ -19,8 +19,8 @@ import (
 
 var (
 	Version_x byte = 26
-	Version_y byte = 10
-	Version_z byte = 31
+	Version_y byte = 11
+	Version_z byte = 9
 )
 
 var (