diff --git a/package.json b/package.json
index 2e1de11..083daf9 100644
--- a/package.json
+++ b/package.json
@@ -349,7 +349,7 @@
     "markdown-it-mathjax": "^2.0.0",
     "markdown-it-sub": "^1.0.0",
     "markdown-it-sup": "^1.0.0",
-    "markdown-it-table-of-contents": "^0.4.4",
+    "markdown-it-table-of-contents": "^0.6.0",
     "mathjax": "^3.0.1",
     "mathjax-full": "^3.0.1",
     "string": "git+ssh://git@github.com/hackmdio/string.js.git#a68176b3d",