diff --git a/Dockerfile b/Dockerfile
index 6d28f11..9186ace 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.13.5-slim
 
 RUN groupadd -r appgroup && useradd -r -g appgroup appuser
 WORKDIR /secure.mail