diff --git a/Dockerfile b/Dockerfile
index 55f4f65..bb52e75 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@
 # * rccsmin
 
 # https://hub.docker.com/_/python
-FROM python:3.14.2-alpine
+FROM python:3.15.0a5-alpine
 
 COPY requirements.txt /tmp/requirements.txt