diff --git a/README.md b/README.md
index c8e71f46..d1a7d955 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ For the creation of [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) UUIDs
 - **Cross-platform** - Support for ...
   - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
   - Node 10, 12, 14, 16
-  - Chrome, Safari, Firefox, Edge, IE 11 browsers
+  - Chrome, Safari, Firefox, Edge browsers
   - Webpack and rollup.js module bundlers
   - [React Native / Expo](#react-native--expo)
 - **Secure** - Cryptographically-strong random values
@@ -417,6 +417,10 @@ Note: If you are using Expo, you must be using at least `react-native-get-random
 
 [In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
 
+### IE 11 (Internet Explorer)
+
+Support for IE11 and other legacy browsers has been dropped as of `uuid@9`. If you need to support legacy browsers, you can always transpile the uuid module source yourself (e.g. using [Babel](https://babeljs.io/)).
+
 ## Upgrading From `uuid@7`
 
 ### Only Named Exports Supported When Using with Node.js ESM
diff --git a/README_js.md b/README_js.md
index 74d05024..8bd0f363 100644
--- a/README_js.md
+++ b/README_js.md
@@ -25,7 +25,7 @@ For the creation of [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) UUIDs
 - **Cross-platform** - Support for ...
   - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
   - Node 10, 12, 14, 16
-  - Chrome, Safari, Firefox, Edge, IE 11 browsers
+  - Chrome, Safari, Firefox, Edge browsers
   - Webpack and rollup.js module bundlers
   - [React Native / Expo](#react-native--expo)
 - **Secure** - Cryptographically-strong random values
@@ -426,6 +426,10 @@ Note: If you are using Expo, you must be using at least `react-native-get-random
 
 [In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
 
+### IE 11 (Internet Explorer)
+
+Support for IE11 and other legacy browsers has been dropped as of `uuid@9`. If you need to support legacy browsers, you can always transpile the uuid module source yourself (e.g. using [Babel](https://babeljs.io/)).
+
 ## Upgrading From `uuid@7`
 
 ### Only Named Exports Supported When Using with Node.js ESM
diff --git a/babel.config.json b/babel.config.json
index a15d3dc2..8e10f533 100644
--- a/babel.config.json
+++ b/babel.config.json
@@ -3,16 +3,62 @@
   "plugins": [],
   "env": {
     "commonjsNode": {
-      "presets": [["@babel/preset-env", { "targets": { "node": "10" }, "modules": "commonjs" }]]
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "node": "10"
+            },
+            "modules": "commonjs"
+          }
+        ]
+      ]
     },
     "esmNode": {
-      "presets": [["@babel/preset-env", { "targets": { "node": "10" }, "modules": false }]]
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "node": "10"
+            },
+            "modules": false
+          }
+        ]
+      ]
     },
     "commonjsBrowser": {
-      "presets": [["@babel/preset-env", { "modules": "commonjs" }]]
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "chrome": "49",
+              "edge": "14",
+              "firefox": "51",
+              "safari": "11"
+            },
+            "modules": "commonjs"
+          }
+        ]
+      ]
     },
     "esmBrowser": {
-      "presets": [["@babel/preset-env", { "modules": false }]]
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "chrome": "49",
+              "edge": "14",
+              "firefox": "51",
+              "safari": "11"
+            },
+            "modules": false
+          }
+        ]
+      ]
     }
   }
 }
diff --git a/wdio.conf.js b/wdio.conf.js
index ba65b528..cc1048e6 100644
--- a/wdio.conf.js
+++ b/wdio.conf.js
@@ -40,20 +40,11 @@ const capabilities = [
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Chrome',
     browserVersion: '92.0',
   },
-  {
-    'bstack:options': {
-      ...commonCapabilities,
-      os: 'Windows',
-      osVersion: '10',
-    },
-    browserName: 'Chrome',
-    browserVersion: '81.0',
-  },
   // Chrome 49 released on 2016-03-02 was the last version supported on Windows XP, Windows Vista, Mac OS X 10.6, 10.7, and 10.8
   {
     'bstack:options': {
@@ -66,15 +57,17 @@ const capabilities = [
   },
 
   // Firefox
+  // Latest
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Firefox',
-    browserVersion: '75.0',
+    browserVersion: '94.0',
   },
+  // Firefox 51 was the first Firefox to correctly support const/let
   {
     'bstack:options': {
       ...commonCapabilities,
@@ -82,7 +75,7 @@ const capabilities = [
       osVersion: '10',
     },
     browserName: 'Firefox',
-    browserVersion: '44.0',
+    browserVersion: '51.0',
   },
 
   // Edge
@@ -90,11 +83,13 @@ const capabilities = [
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Edge',
-    browserVersion: '81.0',
+    browserVersion: '96.0',
   },
+  // While Edge 12 already supported const/let, Edge 15 is the earliest Edge available on
+  // Browserstack
   {
     'bstack:options': {
       ...commonCapabilities,
@@ -110,19 +105,20 @@ const capabilities = [
     'bstack:options': {
       ...commonCapabilities,
       os: 'OS X',
-      osVersion: 'Catalina',
+      osVersion: 'Monterey',
     },
     browserName: 'Safari',
-    browserVersion: '13.0',
+    browserVersion: '15.0',
   },
+  // Safari 11 was the first Safari to correctly support const/let
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'OS X',
-      osVersion: 'Sierra',
+      osVersion: 'High Sierra',
     },
     browserName: 'Safari',
-    browserVersion: '10.0',
+    browserVersion: '11.0',
   },
 ];