diff --git a/.editorconfig b/.editorconfig
index 8c28df6..525208a 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -5,7 +5,7 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..8ba75a5
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,6 @@
+{
+  "recommendations": [
+    "marp-team.marp-vscode",
+    "yzhang.markdown-all-in-one"
+  ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..3ddb275
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,4 @@
+{
+  "markdown.marp.enableHtml": true,
+  "editor.formatOnSave": true,
+}