diff --git a/composer.json b/composer.json
index a50e944..9fd5e42 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,7 @@
     "ext-mbstring": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8",
-    "phpbench/phpbench": "^0.13.0"
+    "phpunit/phpunit": "^4.8"
   },
   "config": {
     "bin-dir": "bin"