diff --git a/taiga/projects/services/filters.py b/taiga/projects/services/filters.py
index c779c2cb..e600c9da 100644
--- a/taiga/projects/services/filters.py
+++ b/taiga/projects/services/filters.py
@@ -20,14 +20,14 @@ from django.db import connection
 
 def _get_stories_tags(project):
     result = set()
-    for tags in project.user_stories.values("tags", flat=True):
+    for tags in project.user_stories.values_list("tags", flat=True):
         result.update(tags)
     return result
 
 
 def _get_issues_tags(project):
     result = set()
-    for tags in project.issues.values("tags", flat=True):
+    for tags in project.issues.values_list("tags", flat=True):
         result.update(tags)
     return result