diff --git a/Dockerfile b/Dockerfile
index 49d7f34..0d8210f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM cloudron/base:1.0.0
+FROM cloudron/base:1.0.0@sha256:147a648a068a2e746644746bbfb42eb7a50d682437cead3c67c933c546357617
 
 RUN mkdir -p /app/code
 WORKDIR /app/code