diff --git a/docker/arm/Dockerfile b/docker/arm/Dockerfile
index 8111cc6..ebb8963 100644
--- a/docker/arm/Dockerfile
+++ b/docker/arm/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-FROM python:3.13.1-alpine3.20
+FROM python:3.13.1-alpine3.21
 WORKDIR /code
 ARG DEBIAN_FRONTEND=noninteractive
 ADD . /code