diff --git a/Dockerfile b/Dockerfile
index 2d1cb95..76c49b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.18
+FROM alpine:3.21
 ENV TZ Asia/Shanghai
 RUN apk add alpine-conf tzdata dumb-init && \
     /sbin/setup-timezone -z Asia/Shanghai && \