diff --git a/image/Dockerfile b/image/Dockerfile
index 314192c..ed32651 100644
--- a/image/Dockerfile
+++ b/image/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/alpine:3.19
+FROM docker.io/alpine:3.21
 RUN apk add openjdk17-jre
 RUN adduser -u 1000 -h /var/server -D execute
 RUN mkdir -p /var/exec