diff --git a/package.json b/package.json
index b8747a9..6a73edf 100644
--- a/package.json
+++ b/package.json
@@ -45,11 +45,13 @@
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^8.10.0",
     "eslint-plugin-svelte": "^2.35.1",
+    "gray-matter": "^4.0.3",
     "mdsvex": "^0.11.0",
     "postcss": "^8.4.35",
     "prettier": "^2.8.8",
     "prettier-plugin-svelte": "^2.10.1",
     "rehype-img-size": "^1.0.1",
+    "rehype-slug": "^6.0.0",
     "remark-external-links": "^9.0.1",
     "remark-slug": "^7.0.1",
     "remark-toc": "^9.0.0",