diff --git a/composer.json b/composer.json
index afb962583..7388e84bb 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "doctrine/phpcr-bundle": "^2.0",
         "doctrine/phpcr-odm": "^1.5",
         "jackalope/jackalope-doctrine-dbal": "^1.3",
-        "jms/serializer-bundle": "^3.5",
+        "jms/serializer-bundle": "^2.4|^3.5",
         "phpunit/phpunit": "^9.6",
         "phpspec/prophecy-phpunit": "^2.2",
         "knplabs/knp-components": "^3.0|^4.0",
@@ -57,5 +57,8 @@
         "allow-plugins": {
             "ocramius/package-versions": true
         }
+    },
+    "conflict": {
+        "jms/serializer": "<3.8"
     }
 }