diff --git a/.docfx/docfx.json b/.docfx/docfx.json
index 6e537afe7..ab2851d5b 100644
--- a/.docfx/docfx.json
+++ b/.docfx/docfx.json
@@ -117,7 +117,7 @@
       }
     ],
     "sitemap": {
-      "baseUrl": "https://careboo.github.io/unity-algorand-sdk/4.1",
+      "baseUrl": "https://careboo.github.io/unity-algorand-sdk/4.2",
       "changefreq": "monthly",
       "fileOptions": {
         "api/*": {
diff --git a/Algorand.Unity.AssetStore/Packages/com.careboo.unity-algorand-sdk/package.json b/Algorand.Unity.AssetStore/Packages/com.careboo.unity-algorand-sdk/package.json
index 2da2f5382..4461f98dd 100644
--- a/Algorand.Unity.AssetStore/Packages/com.careboo.unity-algorand-sdk/package.json
+++ b/Algorand.Unity.AssetStore/Packages/com.careboo.unity-algorand-sdk/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.careboo.unity-algorand-sdk",
   "displayName": "Algorand.Unity",
-  "version": "4.1.0",
+  "version": "4.2.0-exp.1",
   "unity": "2021.3",
   "keywords": [
     "algorand",
@@ -21,9 +21,9 @@
     "access": "public"
   },
   "repository": "github:CareBoo/unity-algorand-sdk",
-  "changelogUrl": "https://careboo.github.io/unity-algorand-sdk/4.1/changelog",
-  "documentationUrl": "https://careboo.github.io/unity-algorand-sdk/4.1",
-  "licensesUrl": "https://careboo.github.io/unity-algorand-sdk/4.1/license",
+  "changelogUrl": "https://careboo.github.io/unity-algorand-sdk/4.2/changelog",
+  "documentationUrl": "https://careboo.github.io/unity-algorand-sdk/4.2",
+  "licensesUrl": "https://careboo.github.io/unity-algorand-sdk/4.2/license",
   "author": {
     "name": "CareBoo",
     "url": "https://github.com/CareBoo"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d11653a7..449de58c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
+# [4.2.0-exp.1](https://github.com/CareBoo/unity-algorand-sdk/compare/v4.1.0...v4.2.0-exp.1) (2023-08-04)
+
+
+### Features
+
+* **crypto:** add ChaCha20 Encrypt and Decrypt functions ([c4c2672](https://github.com/CareBoo/unity-algorand-sdk/commit/c4c267230e046a67efcf238c0d45bf110b30c2f9))
+
 # [4.1.0](https://github.com/CareBoo/unity-algorand-sdk/compare/v4.0.0...v4.1.0) (2023-05-03)
 
 
diff --git a/README.md b/README.md
index 94de97a46..a90211953 100755
--- a/README.md
+++ b/README.md
@@ -158,7 +158,7 @@ Read [Getting Started](docs/getting_started.md) to learn the basic workflows for
 
 ### Documentation Site
 
-Docs for this version were generated at https://careboo.github.io/unity-algorand-sdk/4.1.
+Docs for this version were generated at https://careboo.github.io/unity-algorand-sdk/4.2.
 
 ### Samples
 
diff --git a/package.json b/package.json
index 2ed917919..b14b9fa58 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.careboo.unity-algorand-sdk",
   "displayName": "Algorand.Unity",
-  "version": "4.1.0",
+  "version": "4.2.0-exp.1",
   "unity": "2021.3",
   "keywords": [
     "algorand",
@@ -21,9 +21,9 @@
     "access": "public"
   },
   "repository": "github:CareBoo/unity-algorand-sdk",
-  "changelogUrl": "https://careboo.github.io/unity-algorand-sdk/4.1/changelog",
-  "documentationUrl": "https://careboo.github.io/unity-algorand-sdk/4.1",
-  "licensesUrl": "https://careboo.github.io/unity-algorand-sdk/4.1/license",
+  "changelogUrl": "https://careboo.github.io/unity-algorand-sdk/4.2/changelog",
+  "documentationUrl": "https://careboo.github.io/unity-algorand-sdk/4.2",
+  "licensesUrl": "https://careboo.github.io/unity-algorand-sdk/4.2/license",
   "author": {
     "name": "CareBoo",
     "url": "https://github.com/CareBoo"