diff --git a/composer.json b/composer.json
index 64ad74e..14902a6 100644
--- a/composer.json
+++ b/composer.json
@@ -71,7 +71,10 @@
         "symfony/security-acl": "^2.8|^3.0"
     },
     "config": {
-        "sort-packages": true
+        "sort-packages": true,
+        "platform": {
+            "php": "7.2.24"
+        }
     },
     "scripts": {
         "symfony-scripts": [