diff --git a/example/package-lock.json b/example/package-lock.json
index 263c45d9..77d1e869 100644
--- a/example/package-lock.json
+++ b/example/package-lock.json
@@ -3251,14 +3251,6 @@
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         },
-        "async": {
-          "version": "2.6.3",
-          "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
-          "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
-          "requires": {
-            "lodash": "^4.17.14"
-          }
-        },
         "async-each": {
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           "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
@@ -9856,16 +9848,10 @@
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           "requires": {
-            "async": "^1.5.2",
             "debug": "^2.2.0",
             "mkdirp": "0.5.x"
           },
           "dependencies": {
-            "async": {
-              "version": "1.5.2",
-              "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-              "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
-            },
             "debug": {
               "version": "2.6.9",
               "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -14388,9 +14374,9 @@
       "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg=="
     },
     "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==",
       "requires": {
         "lodash": "^4.17.14"
       }