diff --git a/apps/course/serializers/course.py b/apps/course/serializers/course.py
index 312a788..de11326 100644
--- a/apps/course/serializers/course.py
+++ b/apps/course/serializers/course.py
@@ -24,6 +24,9 @@ class CourseListSerializer(serializers.ModelSerializer):
     thumbnail = serializers.SerializerMethodField()
     participant_count = serializers.SerializerMethodField()
     lessons_count = serializers.SerializerMethodField()
+    price = serializers.SerializerMethodField()
+    discount_percentage = serializers.SerializerMethodField()
+    final_price = serializers.SerializerMethodField()
     
     class Meta:
         model = Course        
@@ -56,6 +59,15 @@ class CourseListSerializer(serializers.ModelSerializer):
     def get_lessons_count(self, obj):
         lessons_count = obj.lessons.filter(is_active=True).count()
         return max(lessons_count, obj.lessons_count)
+        
+    def get_price(self, obj):
+        return 0 if obj.is_free else obj.price
+        
+    def get_discount_percentage(self, obj):
+        return 0 if obj.is_free else obj.discount_percentage
+        
+    def get_final_price(self, obj):
+        return 0 if obj.is_free else obj.final_price
 
         
         
@@ -72,6 +84,9 @@ class CourseDetailSerializer(serializers.ModelSerializer):
     last_lesson_id = serializers.SerializerMethodField()
     room_id = serializers.SerializerMethodField()  
     user_transaction_status = serializers.SerializerMethodField()
+    price = serializers.SerializerMethodField()
+    discount_percentage = serializers.SerializerMethodField()
+    final_price = serializers.SerializerMethodField()
     class Meta:
         model = Course        
         fields = [
@@ -199,7 +214,15 @@ class CourseDetailSerializer(serializers.ModelSerializer):
     
     def get_participant_count(self, obj):
         return obj.participants.count()
-
+        
+    def get_price(self, obj):
+        return 0 if obj.is_free else obj.price
+        
+    def get_discount_percentage(self, obj):
+        return 0 if obj.is_free else obj.discount_percentage
+        
+    def get_final_price(self, obj):
+        return 0 if obj.is_free else obj.final_price
     
     
 class MyCourseListSerializer(serializers.ModelSerializer):