diff --git a/composer.json b/composer.json
index 2c31ef4..2e8f07a 100644
--- a/composer.json
+++ b/composer.json
@@ -51,7 +51,8 @@
     "config": {
         "allow-plugins": {
             "composer/installers": true,
-            "johnpbloch/wordpress-core-installer": true
+            "johnpbloch/wordpress-core-installer": true,
+            "dealerdirect/phpcodesniffer-composer-installer": true
         }
     }
 }
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 3bce286..c242458 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-ARG PHP_VERSION=8.0
+ARG PHP_VERSION=7.4
 
 FROM wordpress:php${PHP_VERSION}-apache