diff --git a/composer.json b/composer.json
index 37a86a7..568f9be 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,6 @@
     },
     "require-dev": {
         "ext-zlib": "*",
-        "ergebnis/composer-normalize": "^2.6",
         "guzzlehttp/psr7": "^1.0 || ^2.0",
         "php-http/message-factory": "^1.0.2",
         "phpspec/phpspec": "^5.1 || ^6.3 || ^7.1",