diff --git a/src/Symfony/Component/String/composer.json b/src/Symfony/Component/String/composer.json
index 94a58f6ec3..b44b8e0b7f 100644
--- a/src/Symfony/Component/String/composer.json
+++ b/src/Symfony/Component/String/composer.json
@@ -19,12 +19,12 @@
         "php": "^7.2.5",
         "symfony/polyfill-intl-grapheme": "~1.0",
         "symfony/polyfill-intl-normalizer": "~1.0",
-        "symfony/polyfill-mbstring": "~1.0",
-        "symfony/translation-contracts": "^1.1|^2"
+        "symfony/polyfill-mbstring": "~1.0"
     },
     "require-dev": {
         "symfony/error-handler": "^4.4|^5.0",
         "symfony/http-client": "^4.4|^5.0",
+        "symfony/translation-contracts": "^1.1|^2",
         "symfony/var-exporter": "^4.4|^5.0"
     },
     "autoload": {