diff --git a/package-lock.json b/package-lock.json
index e458cd6..cbde870 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,9 +36,12 @@
       "dev": true
     },
     "async": {
-      "version": "0.9.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz",
-      "integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "lodash": "^4.17.14"
+      }
     },
     "asynckit": {
       "version": "0.4.0",
diff --git a/package.json b/package.json
index 94210ac..e08bdf1 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "test": "./node_modules/.bin/mocha 'test/**/*.spec.js'"
   },
   "dependencies": {
-    "async": "~0.9.0",
+    "async": "~2.6.4",
     "cjson": "~0.3.0",
     "deep": "0.0.2",
     "fs-extra": "~0.10.0",