diff --git a/composer.json b/composer.json
index 92114b8..4fa2478 100644
--- a/composer.json
+++ b/composer.json
@@ -19,11 +19,13 @@
         "behat/mink": "^1.7",
         "behat/mink-browserkit-driver": "^1.3",
         "behat/mink-extension": "^2.2",
+        "friends-of-behat/cross-container-extension": "^0.1",
         "friends-of-behat/test-context": "^0.3",
         "symfony/framework-bundle": "^2.7|^3.0"
     },
     "suggest": {
-        "behat/mink-browserkit-driver": "^1.3"
+        "behat/mink-browserkit-driver": "^1.3",
+        "friends-of-behat/cross-container-extension": "^0.1"
     },
     "autoload": {
         "psr-4": { "FriendsOfBehat\\SymfonyExtension\\": "src/" }