diff --git a/composer.json b/composer.json
index e45c30d..3ce7eed 100644
--- a/composer.json
+++ b/composer.json
@@ -97,7 +97,8 @@
         "drush/drush": "^10.3",
         "drutopia/drutopia": "dev-8.x-1.x",
         "vlucas/phpdotenv": "^5.1",
-        "webflo/drupal-finder": "^1.2"
+        "webflo/drupal-finder": "^1.2",
+        "wikimedia/composer-merge-plugin": "^2.0"
     },
     "require-dev": {
         "behat/behat": "^3.4",