diff --git a/docs/major-mode.md b/docs/major-mode.md
index aba945e..7aad8cd 100644
--- a/docs/major-mode.md
+++ b/docs/major-mode.md
@@ -133,6 +133,18 @@ Required extensions:
 
 - [Python](https://marketplace.visualstudio.com/items?itemName=ms-python.python)
 
+## Quarto
+
+Required extensions:
+
+- [Quarto](https://marketplace.visualstudio.com/items?itemName=quarto.quarto)
+
+## R
+
+Required extensions:
+
+- [R](https://marketplace.visualstudio.com/items?itemName=REditorSupport.r)
+
 ## Ruby
 
 Required extensions: