diff --git a/CHANGES.md b/CHANGES.md
index 3131b947..b59e20a6 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,6 +5,7 @@
 * Fix regex that was not using py312 notation
 * Change sort backlog and manual segment search results episode number
 * Change sort episodes when set to wanted on display show page
+* Fix banner url validation for TheTVDb api v3 lib
 
 
 ### 3.29.4 (2023-06-07 13:45:00 UTC)
diff --git a/lib/api_tvdb/tvdb_api.py b/lib/api_tvdb/tvdb_api.py
index b90f3a44..ffd5bb24 100644
--- a/lib/api_tvdb/tvdb_api.py
+++ b/lib/api_tvdb/tvdb_api.py
@@ -518,7 +518,8 @@ class Tvdb(TVInfoBase):
                 if None is not v:
                     if k in ['banner', 'fanart', 'poster', 'image'] and v:
                         v = (self.config['url_artworks'],
-                             self.config['url_artworks_search'])['banners/' in v] % v.lstrip('/')
+                             self.config['url_artworks_search'])[
+                                isinstance(v, string_types) and v.lstrip('/').startswith('banners/')] % v.lstrip('/')
                     elif 'genre' == k:
                         keep_data['genre_list'] = v
                         v = '|'.join([clean_data(c) for c in v if isinstance(c, string_types)])