diff --git a/app/utils/converters.py b/app/utils/converters.py
index 3caae7b..e887f9b 100644
--- a/app/utils/converters.py
+++ b/app/utils/converters.py
@@ -63,7 +63,7 @@ class PageConverter(BaseConverter):
 
         t = self.object.query.filter_by(id=tid).first()
         if t is None:
-            raise Exception(f"BaseConverter: no object with id {url}")
+            raise ValidationError(f"BaseConverter: no object with id {url}")
 
         return (t, page)