diff --git a/Dockerfile b/Dockerfile
index 4be8457..3df15e4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.12.4-slim
+FROM python:3.12.4-slim@sha256:2fba8e70a87bcc9f6edd20dda0a1d4adb32046d2acbca7361bc61da5a106a914
 LABEL maintainer="Team Polarion (CLEW/WZU/POLARION) <polarion@sbb.ch>"
 
 RUN apt-get update && \