diff --git a/script/update_online.cmd b/script/update_online.cmd
new file mode 100644
index 0000000..0cee3d8
--- /dev/null
+++ b/script/update_online.cmd
@@ -0,0 +1,18 @@
+@echo off
+set dir=%~dp0
+cd %dir%
+
+set download_url=""
+
+curl -L %download_url% -o %dir%\dislocker_client.zip
+
+mkdir %dir%\temp_ds
+tar -xf %dir%\dislocker_client.zip -C %dir%\temp_ds
+
+rmdir /s /q C:\ProgramData\Dislocker\_internal
+xcopy /e %dir%\temp_ds C:\ProgramData\Dislocker
+xcopy /Y %dir%\temp_ds\dislocker_client.exe C:\ProgramData\Dislocker\dislocker_client.exe
+rmdir /s /q %dir%\temp_ds
+del %dir%\dislocker_client.zip
+echo アップデート完了。Defenderの警告を消すため、一度起動しておいてください。
+pause
\ No newline at end of file