diff --git a/apps/course/serializers/course.py b/apps/course/serializers/course.py
index de11326..5361182 100644
--- a/apps/course/serializers/course.py
+++ b/apps/course/serializers/course.py
@@ -24,9 +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()
+    # price = serializers.SerializerMethodField()
+    # discount_percentage = serializers.SerializerMethodField()
+    # final_price = serializers.SerializerMethodField()
     
     class Meta:
         model = Course        
@@ -61,16 +61,17 @@ class CourseListSerializer(serializers.ModelSerializer):
         return max(lessons_count, obj.lessons_count)
         
     def get_price(self, obj):
-        return 0 if obj.is_free else obj.price
+        if obj.is_free:
+            return "0.00"
+        return str(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
-
-        
-        
+        if obj.is_free:
+            return "0.00"
+        return str(obj.final_price)
     
     
 class CourseDetailSerializer(serializers.ModelSerializer):
@@ -216,13 +217,17 @@ class CourseDetailSerializer(serializers.ModelSerializer):
         return obj.participants.count()
         
     def get_price(self, obj):
-        return 0 if obj.is_free else obj.price
+        if obj.is_free:
+            return "0.00"
+        return str(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
+        if obj.is_free:
+            return "0.00"
+        return str(obj.final_price)
     
     
 class MyCourseListSerializer(serializers.ModelSerializer):