diff --git a/package.json b/package.json
index 0e8e649..45b1c55 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,9 @@
     }
   },
   "devDependencies": {
+    "@codemirror/language": "^6.11.3",
     "@heroicons/react": "^2.2.0",
+    "@lezer/highlight": "^1.2.1",
     "@mdxeditor/editor": "^3.52.4",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
@@ -57,6 +59,7 @@
     "react-router-dom": "^7.0.0",
     "tailwindcss": "^3.4.16",
     "typescript": "^5.6.2",
-    "vite": "^7.0.0"
+    "vite": "^7.0.0",
+    "yjs": "^13.6.24"
   }
 }