diff --git a/composer.json b/composer.json
index 7f42035..85384ac 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "type": "library",
     "description": "weichat library.",
     "require": {
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.3"
     },
     "autoload": {
         "psr-4": {