diff --git a/package.json b/package.json
index f16ee6a..7b7a268 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "grunt-contrib-connect": "latest",
     "grunt-contrib-concat": "latest",
     "grunt-saucelabs": "latest",
-    "acorn": "~0.3.1",
+    "acorn": "~7.1.1",
     "mocha": "~1.12.1",
     "q": "~0.9.7",
     "when": "~2.4.0",