diff --git a/docker/Dockerfile b/docker/Dockerfile
index c6db9a6..d67dc61 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.15.3
+FROM alpine:3.15.4
 
 EXPOSE 5353 8080
 
diff --git a/docker/ci/Dockerfile b/docker/ci/Dockerfile
index be530e2..1496d6f 100644
--- a/docker/ci/Dockerfile
+++ b/docker/ci/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.15.3
+FROM alpine:3.15.4
 
 EXPOSE 5353 8080