diff --git a/Dockerfile b/Dockerfile
index 872d15667e..6f83add6f6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # The base image is the latest 8.x node (LTS)
-FROM node:8.9.0
+FROM node:8.9.0@sha256:191a3b81eb1ffc4a478fed6f98631ce9fc24aff55cd13a77a44946c15b7351cc
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app