diff --git a/Dockerfile b/Dockerfile
index 7caaa5d..536a3c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:lts-alpine3.14
+FROM node:lts-alpine3.14@sha256:2fbaecb39357dec8af7afacaba214bba1ecb1da55ba8163f6afe531534787f80
 
 LABEL maintainer="Robert Kaussow <mail@thegeeklab.de>"
 LABEL org.opencontainers.image.authors="Robert Kaussow <mail@thegeeklab.de>"