diff --git a/pyjiit/wrapper.py b/pyjiit/wrapper.py
index e97208f..b1d4885 100644
--- a/pyjiit/wrapper.py
+++ b/pyjiit/wrapper.py
@@ -480,8 +480,9 @@ def get_subject_choices(self, semester: Semester):
         ENDPOINT = "/studentchoiceprint/getsubjectpreference"
         payload_dict = {
             "instituteid": self.session.instituteid,
-            "studentid": self.session.memberid,
+            "clientid": self.session.clientid,
             "registrationid": semester.registration_id,
         }
-        resp = self.__hit("POST", API + ENDPOINT, json=payload_dict, authenticated=True)
+        payload = serialize_payload(payload_dict)
+        resp = self.__hit("POST", API + ENDPOINT, json=payload, authenticated=True)
         return resp["response"]