diff --git a/package-lock.json b/package-lock.json
index bfb4ee0..2deaceb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -51,6 +51,12 @@
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
       "dev": true
     },
+    "atob": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
+      "dev": true
+    },
     "aws-sign2": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
@@ -514,6 +520,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -586,11 +593,6 @@
           "bundled": true,
           "dev": true
         },
-        "atob": {
-          "version": "2.0.3",
-          "bundled": true,
-          "dev": true
-        },
         "babel-code-frame": {
           "version": "6.26.0",
           "bundled": true,
@@ -1673,7 +1675,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",