diff --git a/Dockerfile b/Dockerfile
index 95d50a3..6d7f657 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@
 # * rccsmin
 
 # https://hub.docker.com/_/python
-FROM python:3.14.8-alpine
+FROM python:3.15.0rc3-alpine
 
 COPY requirements.txt /tmp/requirements.txt