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 df44d49..79f1183 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.9.0](https://github.com/didit-protocol/sdk-go/compare/v1.8.0...v1.9.0) (2026-11-10)
+
+
+### Features
+
+* **spec:** sync API spec 2026-11-10 ([4d6bc05](https://github.com/didit-protocol/sdk-go/commit/4d6bc05266976ea398d7d1e9be0fed39b85d06e5))
+
 ## [1.8.0](https://github.com/didit-protocol/sdk-go/compare/v1.7.0...v1.8.0) (2026-11-10)
 
 
diff --git a/internal/version/version.go b/internal/version/version.go
index ba20701..11ab7c9 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -2,4 +2,4 @@
 package version
 
 // Version is the SDK version sent in the User-Agent and X-Didit-Client headers.
-const Version = "1.8.0" // x-release-please-version
+const Version = "1.9.0" // x-release-please-version