diff --git a/apps/tag/serializers.py b/apps/tag/serializers.py
index c09f42f1..c4811f7a 100644
--- a/apps/tag/serializers.py
+++ b/apps/tag/serializers.py
@@ -14,7 +14,7 @@ class TagBaseSerializer(serializers.ModelSerializer):
 
     # todo: refactor this
     # label_translated = TranslatedField()
-    label_translated = serializers.CharField(source='value')
+    label_translated = serializers.CharField(source='value', read_only=True, allow_null=True)
 
     class Meta:
         """Meta class."""
@@ -43,7 +43,7 @@ class TagCategoryBaseSerializer(serializers.ModelSerializer):
 
     # todo: refactor this
     # label_translated = TranslatedField()
-    label_translated = serializers.CharField(source='index_name')
+    label_translated = serializers.CharField(source='index_name', read_only=True, allow_null=True)
     tags = TagBaseSerializer(many=True, read_only=True)
 
     class Meta: