diff --git a/src/Symfony/Component/Form/composer.json b/src/Symfony/Component/Form/composer.json
index 8e2f0989df..9d29f76336 100644
--- a/src/Symfony/Component/Form/composer.json
+++ b/src/Symfony/Component/Form/composer.json
@@ -22,7 +22,8 @@
         "symfony/options-resolver": "~4.3",
         "symfony/polyfill-ctype": "~1.8",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/property-access": "~3.4|~4.0"
+        "symfony/property-access": "~3.4|~4.0",
+        "symfony/service-contracts": "~1.1"
     },
     "require-dev": {
         "doctrine/collections": "~1.0",