diff --git a/Dockerfile b/Dockerfile
index dfbabf3a32e03fa142e4555761078a16b622b6a1..17b115dffae16e04eb242f3dc23a8e4769e2a961 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM amd64/golang:1.11.1-alpine AS golang
+FROM amd64/golang:1.11.1-alpine@sha256:1d9eb297527b4a67366f25219175217c11aff5901c44dc3349d3f3405585f951 AS golang
 
 FROM amd64/node:8.12.0-alpine@sha256:81abb8de1e5e8b6e55bca143b3c2ec1e2d167cb27fd2cd3191a0d222f7c5e710