diff --git a/version.go b/version.go
index 686294db5640..3526a8b61c54 100644
--- a/version.go
+++ b/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.65.0-dev"
+const Version = "1.66.0-dev"