diff --git a/package-lock.json b/package-lock.json
index 5ac0b6b..0fe1f3a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "2.1.1",
       "license": " ",
       "devDependencies": {
-        "async": "~1.5.1",
+        "async": "~2.6.4",
         "chai": "~3.4.1",
         "grunt": "~0.4.5",
         "grunt-cli": "~0.1.13",
@@ -204,9 +204,18 @@
       }
     },
     "node_modules/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==",
+      "dev": true,
+      "dependencies": {
+        "lodash": "^4.17.14"
+      }
+    },
+    "node_modules/async/node_modules/lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "dev": true
     },
     "node_modules/asynckit": {
@@ -1973,6 +1982,12 @@
         "grunt": ">=0.4.1"
       }
     },
+    "node_modules/grunt-newer/node_modules/async": {
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+      "dev": true
+    },
     "node_modules/grunt-newer/node_modules/glob": {
       "version": "7.1.6",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
@@ -4833,10 +4848,21 @@
       "dev": true
     },
     "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
-      "dev": true
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+          "dev": true
+        }
+      }
     },
     "asynckit": {
       "version": "0.4.0",
@@ -6330,6 +6356,12 @@
         "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
+        },
         "glob": {
           "version": "7.1.6",
           "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
diff --git a/package.json b/package.json
index 8b44011..7d191af 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "url": "https://github.com/hulilabs/ju-shared/issues"
   },
   "devDependencies": {
-    "async": "~1.5.1",
+    "async": "~2.6.4",
     "chai": "~3.4.1",
     "grunt": "~0.4.5",
     "grunt-cli": "~0.1.13",