diff --git a/core.go b/core.go
index 8541a427..5b782ad4 100755
--- a/core.go
+++ b/core.go
@@ -19,7 +19,7 @@ import (
 )
 
 const (
-	version  = "4.20"
+	version  = "4.19"
 	build    = "Custom"
 	codename = "Let's Fly"
 	intro    = "A unified platform for anti-censorship."