diff --git a/package-lock.json b/package-lock.json
index 8e0dcc3c7..81d342025 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2682,9 +2682,12 @@
       "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg=="
     },
     "async": {
-      "version": "0.2.10",
-      "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz",
-      "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "lodash": "^4.17.14"
+      }
     },
     "async-each": {
       "version": "1.0.1",
@@ -4686,7 +4689,7 @@
       "dependencies": {
         "domelementtype": {
           "version": "1.1.3",
-          "resolved": "http://registry.npmjs.org/domelementtype/-/domelementtype-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.1.3.tgz",
           "integrity": "sha1-vSh3PiZCiBrsUVRJJCmcXNgiGFs="
         }
       }
@@ -10687,7 +10690,7 @@
       "dependencies": {
         "domelementtype": {
           "version": "1.3.0",
-          "resolved": "http://registry.npmjs.org/domelementtype/-/domelementtype-1.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.3.0.tgz",
           "integrity": "sha1-sXrtguirWeUt2cGbF1bg/BhyBMI="
         },
         "readable-stream": {
diff --git a/package.json b/package.json
index 35fef8a05..77b58e05c 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@webcomponents/url": "~0.7.1",
     "acorn": "^6.0.0",
     "ajv": "^6.9.1",
-    "async": "~0.2.6",
+    "async": "~2.6.4",
     "babel-eslint": "^9.0.0",
     "babel-loader": "^8.0.6",
     "babel-plugin-array-includes": "^2.0.3",