diff --git a/go.mod b/go.mod
index 5b22193..64f0637 100644
--- a/go.mod
+++ b/go.mod
@@ -12,3 +12,5 @@ require (
 	golang.org/x/mobile v0.0.0-20181026062114-a27dd33d354d
 	golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35 // indirect
 )
+
+go 1.13