diff --git a/package-lock.json b/package-lock.json
index 974370f..8e213aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sift",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -278,9 +278,19 @@
       }
     },
     "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"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+        }
+      }
     },
     "async-each": {
       "version": "1.0.3",
@@ -2553,9 +2563,9 @@
           },
           "dependencies": {
             "graceful-fs": {
-              "version": "4.2.4",
-              "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
-              "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==",
+              "version": "1.2.3",
+              "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-1.2.3.tgz",
+              "integrity": "sha1-FaSAaldUfLLS2/J/QuiajDRRs2Q=",
               "dev": true
             }
           }
@@ -2598,6 +2608,15 @@
         "sparkles": "^1.0.0"
       }
     },
+    "graceful-fs": {
+      "version": "3.0.12",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-3.0.12.tgz",
+      "integrity": "sha512-J55gaCS4iTTJfTXIxSVw3EMQckcqkpdRv3IR7gu6sq0+tbC363Zx6KH/SEwXASK9JRbhyZmVjJEVJIOxYsB3Qg==",
+      "dev": true,
+      "requires": {
+        "natives": "^1.1.3"
+      }
+    },
     "graceful-readlink": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
@@ -4119,6 +4138,12 @@
         "to-regex": "^3.0.1"
       }
     },
+    "natives": {
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/natives/-/natives-1.1.6.tgz",
+      "integrity": "sha512-6+TDFewD4yxY14ptjKaS63GVdtKiES1pTPyxn9Jb0rBqPMZ7VcCiooEhPNsr+mqHtMGxa/5c/HhcC4uPEUw/nA==",
+      "dev": true
+    },
     "nomnom": {
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/nomnom/-/nomnom-1.8.1.tgz",
@@ -6376,12 +6401,6 @@
           "integrity": "sha1-uI+UqCzzi4eR1YBG6kAprYjKmdE=",
           "dev": true
         },
-        "graceful-fs": {
-          "version": "4.2.4",
-          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
-          "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==",
-          "dev": true
-        },
         "readable-stream": {
           "version": "1.0.34",
           "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
diff --git a/package.json b/package.json
index c4cad06..bb55e2b 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   "author": "John J Czaplewski <jczaplew@gmail.com>",
   "license": "CC0-1.0",
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^2.6.4",
     "chart.js": "^1.0.2",
     "fastclick": "^1.0.6",
     "leaflet": "^1.0.0-beta.2",