diff --git a/go.mod b/go.mod
index 10281bf..dc9ce1c 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/faiface/glhf v0.0.0-20181018222622-82a6317ac380
 	github.com/faiface/mainthread v0.0.0-20171120011319-8b78f0a41ae3
-	github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7
+	github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7 // indirect
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72
 	github.com/go-gl/mathgl v0.0.0-20190416160123-c4601bc793c7
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0