diff --git a/Dockerfile b/Dockerfile
index cb25028..6761034 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM joseluisq/static-web-server:2.33.1 AS static-web-server
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 LABEL org.opencontainers.image.title=blocky-list-updater
 LABEL org.opencontainers.image.description="Download and watch source lists for blocky DNS."