diff --git a/package-lock.json b/package-lock.json
index f01b467..da7b3e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,9 +29,12 @@
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
     "async": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-0.7.0.tgz",
-      "integrity": "sha1-RCng5i9d4KVPN0WMSfC4l+tSraU="
+      "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",
@@ -204,6 +207,11 @@
         "verror": "1.10.0"
       }
     },
+    "lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+    },
     "mime": {
       "version": "2.5.2",
       "resolved": "https://registry.npmjs.org/mime/-/mime-2.5.2.tgz",
diff --git a/package.json b/package.json
index 9d54679..847596e 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "node": ">=0.10.20"
   },
   "dependencies": {
-    "async": "0.7.0",
+    "async": "2.6.4",
     "mime": "^2.5.2",
     "request": "^2.88.2"
   },