diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index d01506c83d51e9..f941d875cce5f6 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,6 +1,70 @@
 # Release notes
 
-## [v4.0.13](https://github.com/mdn/browser-compat-data/releases/tag/v4.0.13)
+## [v4.1.1](https://github.com/mdn/browser-compat-data/releases/tag/v4.1.1)
+
+December 7, 2021
+
+**We've changed the format of these release notes!** We're experimenting with new release notes. See [this issue](https://github.com/mdn/browser-compat-data/issues/13229) for details and to [give your input](https://github.com/mdn/browser-compat-data/issues/13229).
+
+### General changes
+
+- Web API data for selected browsers now requires version number data ([#13845](https://github.com/mdn/browser-compat-data/pull/13845/)). For the following browsers, no `null` or `true` values remain and version numbers will be required for data added in future releases:
+
+  - Chrome
+  - Chrome for Android
+  - Edge
+  - Firefox
+  - Internet Explorer
+  - Safari
+  - Safari for iOS
+  - Webview Android
+
+- All entries using Safari 6.1, a backport release of Safari 7, have been changed to avoid unexplained discontinuities in support. Since it's no longer used in any support statements, the data for the Safari 6.1 release has been removed. See [the guideline for historic Safari backport releases](https://github.com/mdn/browser-compat-data/blob/main/docs/data-guidelines.md#backported-releases) for more information on this change. ([#11156](https://github.com/mdn/browser-compat-data/pull/11156))
+
+### Removals
+
+Features removed in this release:
+
+- `api.MediaDevices.getDisplayMedia.audio-capture-support` ([#13837](https://github.com/mdn/browser-compat-data/pull/13837))
+- `api.PaymentDetailsUpdate` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.displayItems` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.error` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.modifiers` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.shippingAddressErrors` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.shippingOptions` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.PaymentDetailsUpdate.total` ([#12277](https://github.com/mdn/browser-compat-data/pull/12277))
+- `api.WakeLockSentinel.onrelease` ([#13816](https://github.com/mdn/browser-compat-data/pull/13816))
+- `api.XRLightProbe.onreflectionchange` ([#13374](https://github.com/mdn/browser-compat-data/pull/13374))
+- `api.XRReferenceSpace.onreset` ([#13483](https://github.com/mdn/browser-compat-data/pull/13483))
+- `api.XRSession.onend` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.oninputsourceschange` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onselect` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onselectend` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onselectstart` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onsqueeze` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onsqueezeend` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onsqueezestart` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSession.onvisibilitychange` ([#13597](https://github.com/mdn/browser-compat-data/pull/13597))
+- `api.XRSystem.ondevicechange` ([#13484](https://github.com/mdn/browser-compat-data/pull/13484))
+
+### Additions
+
+Features added in this release:
+
+- `api.EyeDropper.secure_context_required` ([#13808](https://github.com/mdn/browser-compat-data/pull/13808))
+- `api.MediaDevices.getDisplayMedia.audio_capture_support` ([#13837](https://github.com/mdn/browser-compat-data/pull/13837))
+- `api.WakeLockSentinel.release_event` ([#13816](https://github.com/mdn/browser-compat-data/pull/13816))
+- `html.manifest.display_override` ([#13565](https://github.com/mdn/browser-compat-data/pull/13565))
+- `html.manifest.share_target` ([#13803](https://github.com/mdn/browser-compat-data/pull/13803))
+
+### Statistics
+
+- 13 contributors have changed 238 files with 3,330 additions and 2,873 deletions in 41 commits ([`v4.1.0...v4.1.1`](https://github.com/mdn/browser-compat-data/compare/v4.1.0...v4.1.1))
+- 13,377 total features
+- 832 total contributors
+- 3,693 total stargazers
+
+## [v4.1.0](https://github.com/mdn/browser-compat-data/releases/tag/v4.1.0)
 
 December 1, 2021
 
diff --git a/package-lock.json b/package-lock.json
index 515f88ab2265b2..aafb4e294147b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@mdn/browser-compat-data",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 4e776abff929db..cb98a2bff0be79 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mdn/browser-compat-data",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "Browser compatibility data provided by MDN Web Docs",
   "main": "index.js",
   "types": "index.d.ts",