diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 53c8e1b6fa5..cfc308d73ec 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "6.5.1-preview"
+    ".": "6.6.0-preview"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8daf2684428..06b55833171 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project does NOT adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) and packages shipped from the beta service library will always be in `preview` as changes to the API are for non production use and commonly ship breaking changes.
 
 
+## [6.6.0-preview](https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/compare/6.5.1-preview...6.6.0-preview) (2026-08-20)
+
+
+### Features
+
+* **generation:** update request builders and models ([#1150](https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/issues/1150)) ([50d799c](https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/commit/50d799c48888808a43337ccfd51027fc620002e6))
+
 ## [6.5.1-preview](https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/compare/6.5.0-preview...6.5.1-preview) (2026-08-05)
 
 
diff --git a/src/Microsoft.Graph/Microsoft.Graph.Beta.csproj b/src/Microsoft.Graph/Microsoft.Graph.Beta.csproj
index e029b9421d9..fc0639529a8 100644
--- a/src/Microsoft.Graph/Microsoft.Graph.Beta.csproj
+++ b/src/Microsoft.Graph/Microsoft.Graph.Beta.csproj
@@ -27,7 +27,7 @@
     </PackageReleaseNotes>
     <!-- edit this value to change the current major.minor.patch version -->
     <!-- x-release-please-start-version -->
-    <Version>6.5.1-preview</Version>
+    <Version>6.6.0-preview</Version>
     <!-- x-release-please-end -->
     <!-- adds a version suffix if the Prerelease environment variable is set. BUILD_BUILDID is an
     environment variable set by Azure pipelines from the build. We can use the buildid to correlate