diff --git a/hookrelay/Dockerfile b/hookrelay/Dockerfile
index 5696cc1..1b4b290 100644
--- a/hookrelay/Dockerfile
+++ b/hookrelay/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 WORKDIR /app
 # Runtime dependencies only, pinned by the lock — pytest, ruff and mypy