diff --git a/Dockerfile b/Dockerfile
index 0d52a83..1d785e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.12 as runtime
+FROM docker.io/library/alpine:3.21 as runtime
 
 ENTRYPOINT ["waf-tool"]