diff --git a/package-lock.json b/package-lock.json
index 43d9692..711fe59 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -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",
@@ -12931,9 +12926,9 @@
       "dev": true
     },
     "y18n": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
+      "integrity": "sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==",
       "dev": true
     },
     "yallist": {