diff --git a/package.json b/package.json
index 24de60d..94979dd 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "almond": "~0.3.2",
     "amdclean": "~2.7.0",
     "amdefine": "~1.0.0",
-    "async": "~2.0.1",
+    "async": "~2.4.1",
     "chai": "~3.5.0",
     "codecov": "~1.0.1",
     "extract-zip": "~1.5.0",