diff --git a/BackEnd/src/main/java/studycave/studycaverestservice/usos/AuthorizationService.java b/BackEnd/src/main/java/studycave/studycaverestservice/usos/AuthorizationService.java
index d9b18d0..a5540be 100644
--- a/BackEnd/src/main/java/studycave/studycaverestservice/usos/AuthorizationService.java
+++ b/BackEnd/src/main/java/studycave/studycaverestservice/usos/AuthorizationService.java
@@ -82,7 +82,7 @@ public class AuthorizationService {
 
     private void updateUserGroupsAndStudents(String oauth_token, String oauth_token_secret) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException {
         List<NameValuePair> queryParams = new ArrayList<>();
-        queryParams.add(new BasicNameValuePair("fields", "course_unit_id|group_number|class_type|class_type_id|course_id|course_name|course_lang_id"));
+        queryParams.add(new BasicNameValuePair("fields", "course%5Funit%5Fid"));
         queryParams.add(new BasicNameValuePair("oauth_consumer_key", propertiesLoader.getKey()));
         queryParams.add(new BasicNameValuePair("oauth_nonce", "" + (int) (Math.random() * 100000000)));
         queryParams.add(new BasicNameValuePair("oauth_signature_method", "HMAC-SHA1"));