diff --git a/package-lock.json b/package-lock.json
index 7ebd69ae..2a776d66 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -122,12 +122,20 @@
       "dev": true
     },
     "async": {
-      "version": "2.1.5",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.1.5.tgz",
-      "integrity": "sha1-5YfGhYCZSsZ/xW/4bTrFa9voELw=",
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
       "dev": true,
       "requires": {
-        "lodash": "^4.14.0"
+        "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": {
diff --git a/package.json b/package.json
index ee90a0f8..238226b9 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "split2": "^2.0.1"
   },
   "devDependencies": {
-    "async": "~2.1.4",
+    "async": "~2.6.4",
     "basic-auth": "^1.0.3",
     "basic-auth-connect": "^1.0.0",
     "bluebird": "^3.4.0",