diff --git a/composer.json b/composer.json
index 6e8618b..a703505 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,6 @@
         "php": "^5.5|^7.0",
         "guzzlehttp/psr7": "~1.2",
         "php-http/httplug": "^1.0",
-        "php-http/client-implementation": "^1.0",
         "php-http/discovery": "^0.8"
     },
     "require-dev": {