diff --git a/courses/serializers.py b/courses/serializers.py
index 07a7869..5370532 100644
--- a/courses/serializers.py
+++ b/courses/serializers.py
@@ -4,26 +4,17 @@ from users.serializers import UserSerializer
 
 class CourseSerializer(serializers.ModelSerializer):
 	#The set comes from the ManyToMany Relationship in django
-	students = UserSerializer(many=True)
-	professors = UserSerializer(many=True)
-	category = serializers.ReadOnlyField(source ='category.name')
 	class Meta:
 		model = Course
 		fields = ('name', 'slug', 'objectivies', 'content', 'max_students', 'create_date', 
 			'init_register_date', 'end_register_date', 'init_date', 'end_date', 'public', 'category' ,'students', 'professors')
 
 class SubjectSerializer(serializers.ModelSerializer):
-	students = UserSerializer(many=True)
-	professors = UserSerializer(many=True)
-	course = serializers.ReadOnlyField(source='course.name')
-	category = serializers.ReadOnlyField(source ='category.name')
 	class Meta:
 		model = Subject
 		fields = ('name','slug','description','visible','init_date','course','category','professors','course','students')
 
 class TopicSerializer(serializers.ModelSerializer):
-	subject = serializers.ReadOnlyField(source='subject.name')
-	owner = serializers.ReadOnlyField(source='owner.username')
 	class Meta:
 		model = Topic
 		fields = ('name', 'slug','description','create_date','update_date','visible','owner','subject')
--
libgit2 0.21.2