diff --git a/package.json b/package.json
index 8d4b342188..465b34f832 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "test": "make test"
   },
   "dependencies": {
-    "acorn-6to5": "0.9.1-12",
+    "acorn-6to5": "0.9.1-13",
     "ast-types": "0.6.5",
     "chokidar": "0.11.1",
     "commander": "2.5.0",