diff --git a/package-lock.json b/package-lock.json
index 43d9692..5141dc8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2484,9 +2484,9 @@
       "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"
@@ -10637,11 +10637,6 @@
         }
       }
     },
-    "tether": {
-      "version": "1.4.7",
-      "resolved": "https://registry.npmjs.org/tether/-/tether-1.4.7.tgz",
-      "integrity": "sha512-Z0J1aExjoFU8pybVkQAo/vD2wfSO63r+XOPfWQMC5qtf1bI7IWqNk4MiyBcgvvnY8kqnY06dVdvwTK2S3PU/Fw=="
-    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",