diff --git a/Dockerfile b/Dockerfile
index cd48e00..e706716 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.7@sha256:92251458088c638061cda8fd8b403b76d661a4dc6b7ee71b6affcf1872557b2b
+FROM alpine:3.21@sha256:b97e2a89d0b9e4011bb88c02ddf01c544b8c781acf1f4d559e7c8f12f1047ac3
 
 LABEL maintainer="Leonardo Gatica <lgatica@protonmail.com>" \
       caddy_version="0.10.12" \