diff --git a/package.json b/package.json
index 3e4487a36..ee279b6a7 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "private": true,
   "dependencies": {
-    "commonmark": "0.27.0",
+    "commonmark": "hmhealey/commonmark.js#00189db64c261926de98db16ca14d5b1bcba4d8e",
     "commonmark-react-renderer": "hmhealey/commonmark-react-renderer#2e8ea6ac67b683b44782f403b69a06bb0e5c63e6",
     "deep-equal": "1.0.1",
     "harmony-reflect": "1.5.1",