diff --git a/go.mod b/go.mod
index cc328e0f8..1483a3180 100644
--- a/go.mod
+++ b/go.mod
@@ -7,3 +7,5 @@ require github.com/google/blueprint v0.0.0
 replace github.com/golang/protobuf v0.0.0 => ../../external/golang-protobuf
 
 replace github.com/google/blueprint v0.0.0 => ../blueprint
+
+go 1.13