diff --git a/tidal_per_transformers/transformers/track_group_filter_transformer.py b/tidal_per_transformers/transformers/track_group_filter_transformer.py
index d26de25..ac9f329 100644
--- a/tidal_per_transformers/transformers/track_group_filter_transformer.py
+++ b/tidal_per_transformers/transformers/track_group_filter_transformer.py
@@ -55,7 +55,7 @@ def filter_tracks(self, tracks: DataFrame) -> DataFrame:
                                             self.remove_ambient_music,
                                             self.remove_children_music)
 
-        return tracks.join(cleaned_tracks, c.TRACK_GROUP)
+        return tracks.join(cleaned_tracks, c.TRACK_GROUP, how="left")
 
     @staticmethod
     def apply_filters(category_filters: DataFrame,