diff --git a/Dockerfile b/Dockerfile
index d6c7e81..1e4346b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-slim-buster
+FROM python:3.11-slim-buster@sha256:c46b0ae5728c2247b99903098ade3176a58e274d9c7d2efeaaab3e0621a53935
 
 WORKDIR /app