diff --git a/src/Bundle/ChillDocStoreBundle/composer.json b/src/Bundle/ChillDocStoreBundle/composer.json
index 384f6c093..c011ce29b 100644
--- a/src/Bundle/ChillDocStoreBundle/composer.json
+++ b/src/Bundle/ChillDocStoreBundle/composer.json
@@ -3,9 +3,12 @@
     "description": "A Chill bundle to store documents",
     "type": "symfony-bundle",
     "autoload": {
-      "psr-4": { "Chill\\DocStoreBundle\\" : "" }
+        "psr-4": {
+            "Chill\\DocStoreBundle\\": ""
+        }
     },
     "require": {
+        "symfony/mime": "^4 || ^5"
     },
     "license": "AGPL-3.0"
 }