diff --git a/package.json b/package.json
index 2c870b4..85bbc03 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
   "dependencies": {
     "concat-stream": "^1.5.2",
     "diacritics-map": "^0.1.0",
-    "gray-matter": "^3.1.1",
+    "gray-matter": "^4.0.0",
     "lazy-cache": "^2.0.2",
     "list-item": "^1.1.1",
     "markdown-link": "^0.1.1",