diff --git a/m3u8downloader/__init__.py b/m3u8downloader/__init__.py
index ae6db5f1765e1b2747d2801a42c23cff24c1a69e..fee46bd8ceb4389aba3cd2c738b3b3acd7d5341c 100644
--- a/m3u8downloader/__init__.py
+++ b/m3u8downloader/__init__.py
@@ -1 +1 @@
-__version__ = "0.11.0"
+__version__ = "0.11.1"
diff --git a/m3u8downloader/main.py b/m3u8downloader/main.py
index 683c745f462b0f38ebfc04c4a189ba7f736ada12..d04f648961652d65b62d13535e32b1a0e1cb2eda 100644
--- a/m3u8downloader/main.py
+++ b/m3u8downloader/main.py
@@ -17,6 +17,7 @@ import sys
 import os
 import os.path
 import subprocess
+import shutil
 import re
 from urllib.parse import urljoin, urlparse
 from collections import OrderedDict
@@ -294,7 +295,7 @@ class M3u8Downloader:
             if os.path.exists("/bin/rm"):
                 subprocess.run(["/bin/rm", "-rf", self.tempdir])
             elif os.path.exists("C:/Windows/SysWOW64/cmd.exe"):
-                subprocess.run(["rd", "/s", "/q", self.tempdir], shell=True)
+                shutil.rmtree(self.tempdir)
             logger.info("temp files removed")
 
     def mirror_url_resource(self, remote_file_url):
diff --git a/operational b/operational
index 9c24e3588c44eb88b1d2113d89cbcabba44540c1..f3dfc82907de7ff5fea11c597721a9258066332d 100644
--- a/operational
+++ b/operational
@@ -51,6 +51,10 @@ to handle it on ryzen5.
 
 * current                                                             :entry:
 ** 
+** 2020-05-08 add travis CI for this project.
+- add travis CI to run unit tests on linux and windows.
+- add badge in README.rst
+* done                                                                :entry:
 ** 2024-09-17 shell command escape issue when filename contains special characters
 - bug report by Steven Van Ingelgem.
   #+begin_src python
@@ -59,11 +63,21 @@ to handle it on ryzen5.
         shutil.rmtree(self.tempdir)
     logger.info("temp files removed")
   #+end_src
-- 
-** 2020-05-08 add travis CI for this project.
-- add travis CI to run unit tests on linux and windows.
-- add badge in README.rst
-* done                                                                :entry:
+- check all shell invoke.
+  M-x grep
+  git grep --full-name -n -F 'subprocess.'
+- it's because I have shell=True there.
+  all other invokes should be fine.
+  subprocess.run(["rd", "/s", "/q", self.tempdir], shell=True)
+
+  well, mabye just use shutil.rmtree for windows.
+
+  is there shell escape function for windows cmd shell?
+
+  shlex — Simple lexical analysis — Python 3.11.2 documentation
+  https://localdocs.emacsos.com/python3/library/shlex.html#module-shlex
+  that is for unix shell. not cmd shell.
+
 ** 2024-09-17 when it convert my file into mp4 i lose the sound of the video
 could you please add feature to be able to get the ts/m3u8 file without convert