diff --git a/composer.json b/composer.json
index 4a7efe3..c9ad411 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,6 @@
         "php": "^5.5 || ^7.0",
         "php-http/httplug": "^1.0 || ^2.0",
         "php-http/multipart-stream-builder": "^1.0",
-        "php-http/message": "^1.0",
         "php-http/client-common": "^1.1",
         "php-http/discovery": "^1.0",
         "webmozart/assert": "^1.2"