diff --git a/package-lock.json b/package-lock.json
index c977006..2bb0307 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -323,9 +323,12 @@
       "dev": true
     },
     "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"
+      }
     },
     "async-limiter": {
       "version": "1.0.1",
@@ -4191,6 +4194,14 @@
         "async": "^1.2.1",
         "indent-string": "^2.0.0",
         "pad-stream": "^1.0.0"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
       }
     },
     "grunt-contrib-clean": {
@@ -4201,6 +4212,14 @@
       "requires": {
         "async": "^1.5.2",
         "rimraf": "^2.5.1"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
       }
     },
     "grunt-contrib-concat": {
@@ -4551,6 +4570,14 @@
         "lodash": "~4.17.10",
         "underscore.string": "~3.3.4",
         "which": "~1.3.0"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
       }
     },
     "grunt-mocha-istanbul": {
@@ -4577,6 +4604,14 @@
       "requires": {
         "async": "^1.5.2",
         "rimraf": "^2.5.2"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
       }
     },
     "grunt-ng-annotate": {
@@ -5674,6 +5709,12 @@
           "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
           "dev": true
         },
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        },
         "esprima": {
           "version": "2.7.3",
           "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.3.tgz",
diff --git a/package.json b/package.json
index 545ad9b..157e4d8 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "url": ""
   },
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^2.6.4",
     "body-parser": "^1.18.3",
     "connect-redis": "^4.0.3",
     "cookie-parser": "^1.4.1",