diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 466df71..37fcefa 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.1.0"
+  ".": "1.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..da0c376
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,25 @@
+# Changelog
+
+## [1.0.0](https://github.com/didit-protocol/sdk-ruby/compare/v0.1.0...v1.0.0) (2026-10-29)
+
+
+### ⚠ BREAKING CHANGES
+
+* **spec:** the API spec sync changes the SDK surface (nullable fields, removed fields, account.organizations.list returns a page, the session decision response is the SessionDecision component).
+
+### Features
+
+* add bank.account_check (POST /v3/bank/account-check/) and bank_verifications on the decision ([de3a7b8](https://github.com/didit-protocol/sdk-ruby/commit/de3a7b85d29409df6e8a4eeef793c4fbe00a0904))
+* **spec:** sync API spec 2026-10-23 ([#4](https://github.com/didit-protocol/sdk-ruby/issues/4)) ([ce9061c](https://github.com/didit-protocol/sdk-ruby/commit/ce9061c3056274319f5ab9325dba5c8439cc048a))
+* **spec:** sync API spec 2026-10-27 ([#13](https://github.com/didit-protocol/sdk-ruby/issues/13)) ([a7ab2a9](https://github.com/didit-protocol/sdk-ruby/commit/a7ab2a9624d64dfda1c3fa2fb03cd93605523fee))
+
+
+### API Spec Updates
+
+* **spec:** sync API spec 2026-10-25 ([#8](https://github.com/didit-protocol/sdk-ruby/issues/8)) ([2e941a5](https://github.com/didit-protocol/sdk-ruby/commit/2e941a58a29b950f066e9d879f77342a715e9cae))
+* **spec:** sync API spec 2026-10-29 ([#15](https://github.com/didit-protocol/sdk-ruby/issues/15)) ([468dbfc](https://github.com/didit-protocol/sdk-ruby/commit/468dbfc3137c4a84021ce1f51a04c2a689b668bd))
+
+
+### Miscellaneous Chores
+
+* release 1.0.0 ([b183cb4](https://github.com/didit-protocol/sdk-ruby/commit/b183cb463fc00c66d15ab6403f2ecb79c58b49a5))
diff --git a/lib/didit/version.rb b/lib/didit/version.rb
index dc13048..b8e60a2 100644
--- a/lib/didit/version.rb
+++ b/lib/didit/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Didit
-  VERSION = "0.1.0" # x-release-please-version
+  VERSION = "1.0.0" # x-release-please-version
 end