diff --git a/package-lock.json b/package-lock.json
index bbaca3e..046681a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,9 +29,12 @@
       "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
     },
     "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "lodash": "^4.17.14"
+      }
     },
     "backo2": {
       "version": "1.0.2",
@@ -506,6 +509,11 @@
       "resolved": "https://registry.npmjs.org/kareem/-/kareem-1.0.1.tgz",
       "integrity": "sha1-eAXSFbtTIU7Dr5aaHQsfF+PnuVw="
     },
+    "lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+    },
     "media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
diff --git a/package.json b/package.json
index 9081c26..46ff2c6 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "dev": "node server.js"
   },
   "dependencies": {
-    "async": "~1.5.0",
+    "async": "~2.6.4",
     "bluebird": "~3.1.1",
     "body-parser": "~1.14.2",
     "compass": "^0.1.1",