diff --git a/Dockerfile.alpine b/Dockerfile.alpine
index 09ea9d4..2b84859 100644
--- a/Dockerfile.alpine
+++ b/Dockerfile.alpine
@@ -1,7 +1,7 @@
 # Copyright (c) 2018 kalaksi@users.noreply.github.com.
 # This work is licensed under the terms of the MIT license. For a copy, see <https://opensource.org/licenses/MIT>.
 
-FROM alpine:3.20
+FROM alpine:3.21
 LABEL maintainer="kalaksi@users.noreply.github.com"
 
 # See tinyproxy.conf for better explanation of these values.