diff --git a/Dockerfile b/Dockerfile
index 8e16b51..122907a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.13
+FROM alpine:3.15
 MAINTAINER Fabian Beuke <mail@beuke.org>
 
 RUN apk add --update --no-cache \