diff --git a/build/bench/Dockerfile b/build/bench/Dockerfile
index f7cdaeb824..72d39d5db3 100644
--- a/build/bench/Dockerfile
+++ b/build/bench/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9-slim-bullseye as build
+FROM python:3.11-slim-bullseye as build
 
 LABEL author=frappé