diff --git a/composer.json b/composer.json
index 9c8fd44..b8b0233 100644
--- a/composer.json
+++ b/composer.json
@@ -17,8 +17,5 @@
   },
   "autoload": {
     "psr-4": {"mikemix\\": "src/"}
-  },
-  "require-dev": {
-    "phpunit/phpunit": "^6.5"
   }
 }