diff --git a/package.json b/package.json
index bb4e6fc..aefadc4 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "test": "run-s lint ava size"
   },
   "dependencies": {
-    "acorn": "^5.1.2",
+    "acorn": "^6.0.3",
     "has-own-prop": "^1.0.0",
     "lodash.isnull": "^3.0.0",
     "lodash.isundefined": "^3.0.1"