diff --git a/package.json b/package.json
index fc5ed57a77..dd293fabf4 100644
--- a/package.json
+++ b/package.json
@@ -95,6 +95,7 @@
     "react-focus-lock": "^2.4.1",
     "react-transition-group": "^4.4.1",
     "resize-observer-polyfill": "^1.5.1",
+    "rfc4648": "^1.4.0",
     "sanitize-html": "^1.27.1",
     "tar-js": "^0.3.0",
     "text-encoding-utf-8": "^1.0.2",
diff --git a/yarn.lock b/yarn.lock
index 5bd2be1567..ec099bbf7c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7557,6 +7557,11 @@ retry@^0.10.0:
   resolved "https://registry.yarnpkg.com/retry/-/retry-0.10.1.tgz#e76388d217992c252750241d3d3956fed98d8ff4"
   integrity sha1-52OI0heZLCUnUCQdPTlW/tmNj/Q=
 
+rfc4648@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/rfc4648/-/rfc4648-1.4.0.tgz#c75b2856ad2e2d588b6ddb985d556f1f7f2a2abd"
+  integrity sha512-3qIzGhHlMHA6PoT6+cdPKZ+ZqtxkIvg8DZGKA5z6PQ33/uuhoJ+Ws/D/J9rXW6gXodgH8QYlz2UCl+sdUDmNIg==
+
 rimraf@2.6.3:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"