diff --git a/Dockerfile b/Dockerfile
index 3b18f1c..9e18242 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.14.3
+FROM docker.io/library/alpine:3.15.0
 
 RUN apk update && apk add certbot bind-tools