diff --git a/app/api/mobile/apis/courses.rb b/app/api/mobile/apis/courses.rb
index 2e514b6e9..3b2f4dd4c 100644
--- a/app/api/mobile/apis/courses.rb
+++ b/app/api/mobile/apis/courses.rb
@@ -69,7 +69,7 @@ module Mobile
           requires :time, type: String, desc: '年份'
           requires :class_period, type: String, desc: '学时总数'
         end
-        post do
+        put do
           authenticate!
           cs_params = {
             course: params.reject{|k,v| [:term,:time,:class_period].include?(k)},