diff --git a/CHANGES.md b/CHANGES.md
index 29bd0efd8aec..e35287591ce3 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,11 +6,11 @@
 
 - Fixed an issue where `Camera.flyTo` would not work properly with a non-WGS84 Ellipsoid. [#9498](https://github.com/CesiumGS/cesium/pull/9498)
 - Fixed an issue where setting the `ViewportQuad` rectangle after creating the viewport had no effect.[#9511](https://github.com/CesiumGS/cesium/pull/9511)
+- Fixed an issue where TypeScript was not picking up type defintions for `ArcGISTiledElevationTerrainProvider`. [#9522](https://github.com/CesiumGS/cesium/pull/9522)
 
 ##### Deprecated :hourglass_flowing_sand:
 
-- `loadCRN` has been deprecated and will be removed in CesiumJS 1.82. It will be replaced with support for KTX2. [#9478](https://github.com/CesiumGS/cesium/pull/9478)
-- `loadKTX` has been deprecated and will be removed in CesiumJS 1.82. It will be replaced with support for KTX2. [#9478](https://github.com/CesiumGS/cesium/pull/9478)
+- `loadCRN` and `loadKTX` have been deprecated and will be removed in CesiumJS 1.82. They will be replaced with support for KTX2. [#9478](https://github.com/CesiumGS/cesium/pull/9478)
 
 ### 1.80 - 2021-04-01
 
diff --git a/Source/Core/Ion.js b/Source/Core/Ion.js
index 8f440942fd8a..782b811a04af 100644
--- a/Source/Core/Ion.js
+++ b/Source/Core/Ion.js
@@ -4,7 +4,7 @@ import Resource from "./Resource.js";
 
 var defaultTokenCredit;
 var defaultAccessToken =
-  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJlNzhiOGFmZi0wMDhkLTQyZGItODMxYi1jZTE1Yzc1YWU5NDAiLCJpZCI6MjU5LCJpYXQiOjE2MTcyOTExODV9.ZMm6ggSpVEnvlUfE_sa-ZQ5AXhPAFVjshKZMB48w0AE";
+  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI2N2NjZjU1MS02ZDE5LTRjYzAtYjg0Zi0wODc2YjMxNGE1ZWEiLCJpZCI6MjU5LCJpYXQiOjE2MjAwNDczMDl9.159vCWIGDh0dexF393wvC4zUCbq4oZg6VkPAB5U6tg0";
 /**
  * Default settings for accessing the Cesium ion API.
  *
diff --git a/package.json b/package.json
index 3630987b3a65..998f54fdddb7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cesium",
-  "version": "1.80.0",
+  "version": "1.81.0",
   "description": "CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.",
   "homepage": "http://cesium.com/cesiumjs/",
   "license": "Apache-2.0",