diff --git a/DevDockerContainer.md b/DevDockerContainer.md
index e5faf6f..9bf7361 100644
--- a/DevDockerContainer.md
+++ b/DevDockerContainer.md
@@ -83,7 +83,6 @@ container가 붙는지 확인하고, terminal이 붙는지 확인하고, `npm in
 ```
 $code --list-extensions
 WSL: Ubuntu-20.04에 설치된 확장:
-alefragnani.Bookmarks
 bmewburn.vscode-intelephense-client
 bungcip.better-toml
 DavidAnson.vscode-markdownlint
@@ -97,19 +96,9 @@ felixfbecker.php-debug
 Gruntfuggly.todo-tree
 HookyQR.beautify
 mrmlnc.vscode-scss
-ms-azuretools.vscode-docker
 MS-CEINTL.vscode-language-pack-ko
-ms-python.python
-ms-python.vscode-pylance
-ms-toolsai.jupyter
-ms-toolsai.jupyter-keymap
-ms-toolsai.jupyter-renderers
-ms-vscode.cmake-tools
-ms-vscode.cpptools
 octref.vetur
 rifi2k.format-html-in-php
-rust-lang.rust
-twxs.cmake
 TysonAndre.php-phan
 VisualStudioExptTeam.vscodeintellicode
 yzhang.markdown-all-in-one