diff --git a/.babelrc b/.babelrc
index 2aaf3cd1..de03c857 100644
--- a/.babelrc
+++ b/.babelrc
@@ -5,7 +5,6 @@
       {
         "modules": false,
         "corejs": false,
-        "forceAllTransforms": true
       }
     ]
   ]
diff --git a/.browserslistrc b/.browserslistrc
new file mode 100644
index 00000000..2c90ae7e
--- /dev/null
+++ b/.browserslistrc
@@ -0,0 +1,2 @@
+> 0.25%
+not dead
diff --git a/lib/upload.js b/lib/upload.js
index e564de34..7c640f38 100644
--- a/lib/upload.js
+++ b/lib/upload.js
@@ -1,5 +1,3 @@
-import { Base64 } from 'js-base64'
-import URL from 'url-parse'
 import DetailedError from './error.js'
 import { log } from './logger.js'
 import uuid from './uuid.js'
@@ -938,7 +936,7 @@ class BaseUpload {
 
 function encodeMetadata(metadata) {
   return Object.entries(metadata)
-    .map(([key, value]) => `${key} ${Base64.encode(String(value))}`)
+    .map(([key, value]) => `${key} ${btoa(String(value))}`)
     .join(',')
 }
 
diff --git a/package.json b/package.json
index dae89fa0..b4afe1cf 100644
--- a/package.json
+++ b/package.json
@@ -83,10 +83,8 @@
     "buffer-from": "^1.1.2",
     "combine-errors": "^3.0.3",
     "is-stream": "^2.0.0",
-    "js-base64": "^3.7.2",
     "lodash.throttle": "^4.1.1",
-    "proper-lockfile": "^4.1.2",
-    "url-parse": "^1.5.7"
+    "proper-lockfile": "^4.1.2"
   },
   "scripts": {
     "build-test-bundle": "mkdir -p dist && browserify test/spec/browser-index.js -t [ babelify --plugins [ @babel/transform-modules-commonjs ] ] -d -o dist/browser-test-bundle.js",
@@ -108,5 +106,9 @@
     "fix:formatting": "prettier --write .",
     "lint:formatting": "prettier --check .",
     "fix": "yarn fix:formatting"
+  },
+  "volta": {
+    "node": "20.12.2",
+    "yarn": "1.22.19"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index aba0ee76..daf8f6d6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4288,11 +4288,6 @@ jest-get-type@^29.4.3:
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-29.4.3.tgz#1ab7a5207c995161100b5187159ca82dd48b3dd5"
   integrity sha512-J5Xez4nRRMjk8emnTpWrlkyb9pfRQQanDrvWHhsR1+VUfbwxi30eVcZFlcdGInRibU4G5LwHXpI7IRHU0CY+gg==
 
-js-base64@^3.7.2:
-  version "3.7.7"
-  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-3.7.7.tgz#e51b84bf78fbf5702b9541e2cb7bfcb893b43e79"
-  integrity sha512-7rCnleh0z2CkXhH67J8K1Ytz0b2Y+yxTPL+/KOJoa20hfnVQ/3/T6W/KflYI4bRHRagNeXeU2bkNGI3v1oS/lw==
-
 "js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -5421,11 +5416,6 @@ querystring@0.2.0:
   resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
   integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
 
-querystringify@^2.1.1:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/querystringify/-/querystringify-2.2.0.tgz#3345941b4153cb9d082d8eee4cda2016a9aef7f6"
-  integrity sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==
-
 queue-microtask@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/queue-microtask/-/queue-microtask-1.2.2.tgz#abf64491e6ecf0f38a6502403d4cda04f372dfd3"
@@ -6703,14 +6693,6 @@ uri-js@^4.2.2:
   dependencies:
     punycode "^2.1.0"
 
-url-parse@^1.5.7:
-  version "1.5.10"
-  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.5.10.tgz#9d3c2f736c1d75dd3bd2be507dcc111f1e2ea9c1"
-  integrity sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==
-  dependencies:
-    querystringify "^2.1.1"
-    requires-port "^1.0.0"
-
 url@~0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"