diff --git a/Dockerfile b/Dockerfile
index c165b09..929d772 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG ALPINE_VERSION=3.16
+ARG ALPINE_VERSION=3.18
 FROM alpine:${ALPINE_VERSION}
 LABEL Maintainer="Matthias Hemmerich matthias+code@mailbro.de"
 LABEL Description="Forked from https://github.com/TrafeX/docker-php-nginx, Lightweight container with Nginx 1.20 & PHP 8.0 based on Alpine Linux."