diff --git a/Dockerfile b/Dockerfile
index 8261d12..96e0cd8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@
 
 # ----------- deps -----------
 # Install from Debian Stretch with modern Python support
-FROM python:3.11-slim as deps
+FROM python:3.13.5-slim as deps
 
 #
 # Most services will use the same set of packages here, though a few will install