diff --git a/Dockerfile b/Dockerfile
index f9f70fd..9ce3faa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11
+FROM python:3.13@sha256:08471c63c5fdf2644adc142a7fa8d0290eb405cda14c473fbe5b4cd0933af601
 
 WORKDIR /code