diff --git a/composer.json b/composer.json
index dcd65fb..4bc4d65 100644
--- a/composer.json
+++ b/composer.json
@@ -86,6 +86,7 @@
     },
     "config": {
         "allow-plugins": {
+            "composer/package-versions-deprecated": true,
             "symfony/flex": true,
             "symfony/runtime": true
         },