diff --git a/src/server/services/scheduler/folder_rename_service.py b/src/server/services/scheduler/folder_rename_service.py
index aaf9a4f..a3a8be2 100644
--- a/src/server/services/scheduler/folder_rename_service.py
+++ b/src/server/services/scheduler/folder_rename_service.py
@@ -363,7 +363,7 @@ def _cleanup_orphaned_folder(old_path: Path, new_path: Path, dry_run: bool = Fal
         return False
 
 
-def _update_series_folder(db, series, new_folder: str) -> None:
+async def _update_series_folder(db, series, new_folder: str) -> None:
     """Update AnimeSeries.folder in the database.
 
     Args:
@@ -374,7 +374,7 @@ def _update_series_folder(db, series, new_folder: str) -> None:
     if series is None:
         return
 
-    AnimeSeriesService.update(db, series.id, folder=new_folder)
+    await AnimeSeriesService.update(db, series.id, folder=new_folder)
     logger.info("Updated AnimeSeries.folder: %s (id=%s)", new_folder, series.id)
 
 
@@ -455,7 +455,7 @@ async def _update_database_paths(
                     series = s
                     break
 
-        _update_series_folder(db, series, new_folder)
+        await _update_series_folder(db, series, new_folder)
 
         if series is None:
             return
diff --git a/tests/unit/test_folder_rename_service.py b/tests/unit/test_folder_rename_service.py
index 910a2fb..b5c18a2 100644
--- a/tests/unit/test_folder_rename_service.py
+++ b/tests/unit/test_folder_rename_service.py
@@ -226,7 +226,7 @@ class TestUpdateDatabasePaths:
             mock_get_db.return_value.__aenter__ = AsyncMock(return_value=mock_db)
             mock_get_db.return_value.__aexit__ = AsyncMock(return_value=False)
 
-            mock_series_svc.get_by_key = AsyncMock(return_value=mock_series)
+            mock_series_svc.get_by_folder = AsyncMock(return_value=mock_series)
             mock_series_svc.get_all = AsyncMock(return_value=[])
             mock_series_svc.update = AsyncMock(return_value=mock_series)
 
@@ -267,7 +267,7 @@ class TestUpdateDatabasePaths:
             mock_get_db.return_value.__aenter__ = AsyncMock(return_value=mock_db)
             mock_get_db.return_value.__aexit__ = AsyncMock(return_value=False)
 
-            mock_series_svc.get_by_key = AsyncMock(return_value=mock_series)
+            mock_series_svc.get_by_folder = AsyncMock(return_value=mock_series)
             mock_series_svc.get_all = AsyncMock(return_value=[])
             mock_series_svc.update = AsyncMock(return_value=mock_series)