diff --git a/Dockerfile b/Dockerfile
index 667169a..b781ee6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use an official Python runtime as the parent image
-FROM python:3.11.8-alpine
+FROM python:3.11.9-alpine@sha256:0b5ed25d3cc27cd35c7b0352bac8ef2ebc8dd3da72a0c03caaf4eb15d9ec827a
 
 # Set the working directory in the container to /app
 WORKDIR /app