diff --git a/demo/package-lock.json b/demo/package-lock.json
index 2ffab1e..28562de 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -503,9 +503,9 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.3",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
-      "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
+      "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"
@@ -4926,11 +4926,6 @@
           "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
           "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c="
         },
-        "async": {
-          "version": "0.9.2",
-          "resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz",
-          "integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0="
-        },
         "async-each": {
           "version": "1.0.3",
           "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
@@ -10266,7 +10261,6 @@
           "resolved": "https://registry.npmjs.org/utile/-/utile-0.3.0.tgz",
           "integrity": "sha1-E1LDQOuCDk2N26A5pPv6oy7U7zo=",
           "requires": {
-            "async": "~0.9.0",
             "deep-equal": "~0.2.1",
             "i": "0.3.x",
             "mkdirp": "0.x.x",
@@ -10474,7 +10468,6 @@
           "resolved": "https://registry.npmjs.org/winston/-/winston-2.1.1.tgz",
           "integrity": "sha1-PJNJ0ZYgf9G9/51LxD73JRDjoS4=",
           "requires": {
-            "async": "~1.0.0",
             "colors": "1.0.x",
             "cycle": "1.0.x",
             "eyes": "0.1.x",
@@ -10483,11 +10476,6 @@
             "stack-trace": "0.0.x"
           },
           "dependencies": {
-            "async": {
-              "version": "1.0.0",
-              "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
-              "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k="
-            },
             "colors": {
               "version": "1.0.3",
               "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",