diff --git a/PyPI/setup.cfg b/PyPI/setup.cfg
index d040c31..aaf11eb 100644
--- a/PyPI/setup.cfg
+++ b/PyPI/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 # replace with your username:
 name = guan
-version = 0.1.86
+version = 0.1.87
 author = guanjihuan
 author_email = guanjihuan@163.com
 description = An open source python package
diff --git a/PyPI/src/guan.egg-info/PKG-INFO b/PyPI/src/guan.egg-info/PKG-INFO
index 303da7d..d34282a 100644
--- a/PyPI/src/guan.egg-info/PKG-INFO
+++ b/PyPI/src/guan.egg-info/PKG-INFO
@@ -1,6 +1,6 @@
 Metadata-Version: 2.1
 Name: guan
-Version: 0.1.86
+Version: 0.1.87
 Summary: An open source python package
 Home-page: https://py.guanjihuan.com
 Author: guanjihuan
diff --git a/PyPI/src/guan/file_reading_and_writing.py b/PyPI/src/guan/file_reading_and_writing.py
index 6bc65e4..ecdae79 100644
--- a/PyPI/src/guan/file_reading_and_writing.py
+++ b/PyPI/src/guan/file_reading_and_writing.py
@@ -89,7 +89,7 @@ def get_all_filenames_in_directory(directory='./', file_format=None, show_root_p
         if include_subdirectory != 1:
             break
     if sort == 1:
-        sorted(file_list)
+        file_list = sorted(file_list)
     return file_list
 
 # 获取文件夹中某种文本类型的文件以及读取所有内容