diff --git a/courses/serializers.py b/courses/serializers.py
index 33f4d7b..284139c 100644
--- a/courses/serializers.py
+++ b/courses/serializers.py
@@ -31,7 +31,7 @@ class ThemeSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = CourseTheme
-        fields = '__all__'
+        exclude = ('price_type', '_type', 'sort')
 
 
 class CourseListSerializer(serializers.ModelSerializer):