diff --git a/app/utils/system.py b/app/utils/system.py
index 9b4ae625..f8b3b7f5 100644
--- a/app/utils/system.py
+++ b/app/utils/system.py
@@ -88,6 +88,12 @@ class SystemUtils:
 
     @staticmethod
     def list_files_with_extensions(directory: Path, extensions: list) -> List[Path]:
+        """
+        获取目录下所有指定扩展名的文件
+        """
+        if directory.is_file():
+            return [directory]
+
         files = []
         pattern = r".*(" + "|".join(extensions) + ")$"