diff --git a/composer.json b/composer.json
index 919d54a3..2bd09499 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
   },
   "require": {
     "phpunit/phpunit": "^7.1",
-    "mikey179/vfsStream": "~1.6.0",
+    "mikey179/vfsstream": "~1.6.0",
     "typo3fluid/fluid": "^2.5",
     "typo3/cms-core": "^9.3",
     "typo3/cms-backend": "^9.3",