diff --git a/package.json b/package.json
index 77741b9..1424273 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "vinyl-transform": "^1.0.0"
   },
   "devDependencies": {
-    "acorn": "^2.7.0",
+    "acorn": "^7.1.1",
     "babel-polyfill": "^6.3.14",
     "babel-preset-es2015": "^6.3.13",
     "babelify": "^7.2.0",