diff --git a/Dockerfile b/Dockerfile
index ccc51d4..7b54bbf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.15.1
+FROM docker.io/library/alpine:3.15.3
 
 RUN apk update && apk add certbot bind-tools