diff --git a/docker/Dockerfile b/docker/Dockerfile
index 284fc02..2bd01ae 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 EXPOSE 5353 8080
 
diff --git a/docker/ci/Dockerfile b/docker/ci/Dockerfile
index 3588850..d54c33d 100644
--- a/docker/ci/Dockerfile
+++ b/docker/ci/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 EXPOSE 5353 8080