diff --git a/stude/accounts/serializers.py b/stude/accounts/serializers.py
index 94518b1..90f3b54 100644
--- a/stude/accounts/serializers.py
+++ b/stude/accounts/serializers.py
@@ -8,14 +8,20 @@ from student_status.serializers import StudentStatusSerializer
 from student_status.models import StudentStatus
 from rest_framework.settings import api_settings
 from django.contrib.auth.password_validation import validate_password
+from courses.models import Course
+from year_levels.models import Year_Level
+from semesters.models import Semester
 
 
 class CustomUserSerializer(BaseUserSerializer):
     user_status = StudentStatusSerializer(
         source='studentstatus', read_only=True)
-    course = serializers.StringRelatedField()
-    year_level = serializers.StringRelatedField()
-    semester = serializers.StringRelatedField()
+    course = serializers.SlugRelatedField(
+        many=False, slug_field='name', queryset=Course.objects.all(), required=False, allow_null=True)
+    year_level = serializers.SlugRelatedField(
+        many=False, slug_field='name', queryset=Year_Level.objects.all(), required=False, allow_null=True)
+    semester = serializers.SlugRelatedField(
+        many=False, slug_field='name', queryset=Semester.objects.all(), required=False, allow_null=True)
 
     class Meta(BaseUserSerializer.Meta):
         model = CustomUser
diff --git a/stude/study_groups/serializers.py b/stude/study_groups/serializers.py
index bb3b0fe..5c1ec6e 100644
--- a/stude/study_groups/serializers.py
+++ b/stude/study_groups/serializers.py
@@ -1,12 +1,14 @@
 from rest_framework import serializers
 from .models import StudyGroup, StudyGroupMembership
 from accounts.models import CustomUser
+from subjects.models import Subject
 
 
 class StudyGroupSerializer(serializers.ModelSerializer):
     users = serializers.SlugRelatedField(
-        queryset=CustomUser.objects.all(), many=True, slug_field='name', allow_null=True)
-    subject = serializers.CharField(source='subject.Subject', read_only=True)
+        queryset=CustomUser.objects.all(), many=True, slug_field='name', required=False, allow_null=True)
+    subject = serializers.SlugRelatedField(
+        many=False, slug_field='name', queryset=Subject.objects.all(), required=True, allow_null=False)
 
     class Meta:
         model = StudyGroup