diff --git a/CHANGES.md b/CHANGES.md
index 60a35a7f0cf..d7b28353d0e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,6 +7,17 @@
 #### Breaking Changes :mega:
 
 - Changed behavior of `DataSourceDisplay.ready` to always stay `true` once it is initially set to `true`. [#12429](https://github.com/CesiumGS/cesium/pull/12429)
+- Updated `Cesium3DTilesVoxelProvider` to load glTF tiles using the new [`EXT_primitive_voxels` extension](https://github.com/CesiumGS/glTF/pull/69). Tilesets using the previous custom JSON format are no longer supported. [#12432](https://github.com/CesiumGS/cesium/pull/12432)
+- Updated the `requestData` method of the `VoxelProvider` interface to return a `Promise` to a `VoxelContent`. Custom providers should now use the `VoxelContent.fromMetadataArray` method to construct the returned data object. For example:
+
+```js
+CustomVoxelProvider.prototype.requestData = function (options) {
+  const metadataColumn = new Float32Array(options.dataLength);
+  // ... Fill metadataColumn with metadata values ...
+  const content = VoxelContent.fromMetadataArray([metadataColumn]);
+  return Promise.resolve(content);
+};
+```
 
 #### Fixes :wrench: