diff --git a/extensions.json b/extensions.json
index 72ffc5839..2d2625269 100644
--- a/extensions.json
+++ b/extensions.json
@@ -1299,5 +1299,8 @@
   },
   "zxh404.vscode-proto3": {
     "repository": "https://github.com/zxh0/vscode-proto3"
+  },
+  "ExecutableBookProject.myst-highlight": {
+    "repository": "https://github.com/executablebooks/myst-vs-code"
   }
 }