diff --git a/composer.json b/composer.json
index 2a203be68d..5be44f7275 100644
--- a/composer.json
+++ b/composer.json
@@ -195,6 +195,7 @@
         "webonyx/graphql-php": "^15.0"
     },
     "suggest": {
+        "ext-deepclone": "To speed up the PHP files metadata cache with symfony/var-exporter 8.1+ (install symfony/deepclone with PIE).",
         "doctrine/mongodb-odm-bundle": "To support MongoDB. Only versions 4.0 and later are supported.",
         "elasticsearch/elasticsearch": "To support Elasticsearch.",
         "opensearch-project/opensearch-php": "To support OpenSearch (^2.5).",
diff --git a/src/Symfony/composer.json b/src/Symfony/composer.json
index fa02ecace2..cc756a947c 100644
--- a/src/Symfony/composer.json
+++ b/src/Symfony/composer.json
@@ -70,6 +70,7 @@
         "webonyx/graphql-php": "^15.0"
     },
     "suggest": {
+        "ext-deepclone": "To speed up the PHP files metadata cache with symfony/var-exporter 8.1+ (install symfony/deepclone with PIE).",
         "api-platform/doctrine-orm": "To support Doctrine ORM.",
         "api-platform/doctrine-odm": "To support MongoDB. Only versions 4.0 and later are supported.",
         "api-platform/elasticsearch": "To support Elasticsearch.",