diff --git a/interface.py b/interface.py
index 20a96d1..ece1853 100644
--- a/interface.py
+++ b/interface.py
@@ -106,7 +106,7 @@ class Kuser:
             return False
         else:
             if result == False:
-                self._api.login(self._username, self._password)
+                self._api.login(self._username, self._password, 2)
                 result = self._api.check_online()
             if result == False:
                 self.login_failed(chat_id, message_id)
diff --git a/kcoj.py b/kcoj.py
index 687e119..ae2ff1d 100644
--- a/kcoj.py
+++ b/kcoj.py
@@ -7,11 +7,11 @@ class KCOJ:
         self._url = url
         self._session = requests.Session()
     # login KCOJ
-    def login(self, username, password):
+    def login(self, username, password, course):
         try:
             payload = {'name': username, 
                        'passwd': password,
-                       'rdoCourse': 1}
+                       'rdoCourse': course}
             return self._session.post(self._url + '/Login', data=payload, timeout=0.5)
         except requests.exceptions.Timeout:
             return None