diff --git a/go.mod b/go.mod
index c1a8340c5..9b868ddd5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module google.golang.org/grpc
 
+go 1.11
+
 require (
 	cloud.google.com/go v0.26.0 // indirect
 	github.com/BurntSushi/toml v0.3.1 // indirect