diff --git a/Containers/mastercontainer/Dockerfile b/Containers/mastercontainer/Dockerfile
index adf863b2..60b591ab 100644
--- a/Containers/mastercontainer/Dockerfile
+++ b/Containers/mastercontainer/Dockerfile
@@ -5,7 +5,7 @@ FROM docker:23.0.3-cli as docker
 FROM caddy:2.6.4-alpine as caddy
 
 # From https://github.com/docker-library/php/blob/master/8.1/alpine3.17/fpm/Dockerfile
-FROM php:8.1.17-fpm-alpine3.17
+FROM php:8.1.18-fpm-alpine3.17
 
 RUN set -ex; \
     apk add --no-cache shadow; \