diff --git a/lib/dingtalk/api/service.rb b/lib/dingtalk/api/service.rb
index 33cc565..05a69d0 100644
--- a/lib/dingtalk/api/service.rb
+++ b/lib/dingtalk/api/service.rb
@@ -8,7 +8,7 @@ module Dingtalk
 					auth_corpid: corp_id,
 					permanent_code: permanent_code
 				}
-				http_post("get_auth_info?suite_access_token#{suite.suite_access_token}", params)
+				http_post("get_auth_info?suite_access_token=#{suite.suite_access_token}", params)
 			end
 
 			def suite