diff --git a/package.json b/package.json
index c9c52312e1..7d0394dd97 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "css/ol.css"
   ],
   "dependencies": {
-    "async": "1.5.0",
+    "async": "1.5.1",
     "browserify": "12.0.1",
     "closure-util": "1.9.0",
     "derequire": "2.0.3",