diff --git a/go.mod b/go.mod
index 9703b235..b9def8d3 100644
--- a/go.mod
+++ b/go.mod
@@ -43,3 +43,5 @@ require (
 	google.golang.org/grpc v1.23.0 // indirect
 	gotest.tools v2.2.0+incompatible // indirect
 )
+
+go 1.13