diff --git a/acorn/package.json b/acorn/package.json
index f862c38b6..318bed138 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.4.0",
+  "version": "6.4.1",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {