diff --git a/Dockerfile b/Dockerfile
index 6de619726e644d7fcb76902d68c51e031dd4fd17..a3bfbad0dd2d96e989bafce030ad7a3d1dfea5e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:stable-slim
+FROM debian:stable-slim@sha256:88f88a2b8bd1873876a2ff15df523a66602aa57177e24b5f22064c4886ec398a
 
 COPY grafana.gpg /usr/share/keyrings/grafana.gpg
 COPY build.sh /tmp/build.sh