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..23ddcab
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,23 @@
+# Changelog
+
+## [1.0.0](https://github.com/didit-protocol/sdk-php/compare/didit-protocol/sdk-php-v0.1.0...didit-protocol/sdk-php-v1.0.0) (2026-10-29)
+
+
+### ⚠ BREAKING CHANGES
+
+* **spec:** sync API spec 2026-10-23
+
+### Features
+
+* add bank.account_check (POST /v3/bank/account-check/) and bank_verifications on the decision ([3acd01d](https://github.com/didit-protocol/sdk-php/commit/3acd01df9b51b05f8c24174b1a9e0e33159b4353))
+* **spec:** sync API spec 2026-10-23 ([370ec24](https://github.com/didit-protocol/sdk-php/commit/370ec24727bd1f80893095e83db6c70192ce5164))
+* **spec:** sync API spec 2026-10-27 ([#12](https://github.com/didit-protocol/sdk-php/issues/12)) ([61fa406](https://github.com/didit-protocol/sdk-php/commit/61fa406bd33652030be038292b9b1b8de41e20b5))
+
+
+### Miscellaneous Chores
+
+* **deps:** ignore dependabot major that breaks the promised language floor ([#10](https://github.com/didit-protocol/sdk-php/issues/10)) ([ad7ee46](https://github.com/didit-protocol/sdk-php/commit/ad7ee46510070e87b8bea6d6841488b9a5d3df72))
+* release 1.0.0 ([3be7314](https://github.com/didit-protocol/sdk-php/commit/3be7314382d0fbfb6901ba1abe68af148e6875ae))
+* seed sdk-php with the shared design contract and API spec ([f8278bc](https://github.com/didit-protocol/sdk-php/commit/f8278bc8a00f1f7b7844b9859cd7d59d7a50c178))
+* **spec:** sync API spec 2026-10-25 ([#7](https://github.com/didit-protocol/sdk-php/issues/7)) ([dfe6980](https://github.com/didit-protocol/sdk-php/commit/dfe69806d5ee9de03d8c7326295faaa13bc2427b))
+* **spec:** sync API spec 2026-10-29 ([#13](https://github.com/didit-protocol/sdk-php/issues/13)) ([c85dc29](https://github.com/didit-protocol/sdk-php/commit/c85dc29c4e6a009873e97fb2f71686ac255d0f11))
diff --git a/src/Version.php b/src/Version.php
index 5942bfb..346ecf1 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -9,7 +9,7 @@
  */
 final class Version
 {
-    public const VERSION = '0.1.0'; // x-release-please-version
+    public const VERSION = '1.0.0'; // x-release-please-version
 
     private function __construct()
     {