diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 099626f..4fcfdf7 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.8.0"
+  ".": "1.9.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cdf387..b3f6d08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.9.0](https://github.com/didit-protocol/sdk-dotnet/compare/v1.8.0...v1.9.0) (2026-11-10)
+
+
+### Features
+
+* **spec:** sync API spec 2026-11-10 ([762a7c2](https://github.com/didit-protocol/sdk-dotnet/commit/762a7c2e42f23662db1707fa28ab3b51d9aabe27))
+
 ## [1.8.0](https://github.com/didit-protocol/sdk-dotnet/compare/v1.7.0...v1.8.0) (2026-11-10)
 
 
diff --git a/Directory.Build.props b/Directory.Build.props
index b21517d..5df086f 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -18,6 +18,6 @@
     <RepositoryUrl>https://github.com/didit-protocol/sdk-dotnet</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <!-- Managed by release-please (see release-please-config.json). -->
-    <Version>1.8.0</Version> <!-- x-release-please-version -->
+    <Version>1.9.0</Version> <!-- x-release-please-version -->
   </PropertyGroup>
 </Project>