diff --git a/package-lock.json b/package-lock.json
index 825829e..13f0430 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -93,11 +93,18 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
       "requires": {
-        "lodash": "4.17.4"
+        "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=="
+        }
       }
     },
     "babel-code-frame": {
@@ -1822,6 +1829,14 @@
         "yargs": "11.1.0"
       },
       "dependencies": {
+        "async": {
+          "version": "2.6.0",
+          "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
+          "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
+          "requires": {
+            "lodash": "^4.14.0"
+          }
+        },
         "find-up": {
           "version": "2.1.0",
           "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",