diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f927cb..150cea4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,10 @@
 
 All notable changes to this project are documented here. The format follows
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and the project adheres to
-[Semantic Versioning](https://semver.org/spec/v2.0.0.html): until 1.0.0, a minor version may
-change the public API, and a patch version never does.
+[Semantic Versioning](https://semver.org/spec/v2.0.0.html): only a major version changes the
+public API, a minor version adds to it, and a patch version fixes it.
 
-## [0.1.0] - Unreleased
+## [1.0.0] - 2026-10-01
 
 The first release of the Kaiten Python SDK, generated and tested against the contract of
 [`kaitencloud/kaiten@fa7f554f`](https://github.com/kaitencloud/kaiten/commit/fa7f554fb6464f52c2a3f1ed487f4c7383c8125d).
@@ -51,3 +51,5 @@ The first release of the Kaiten Python SDK, generated and tested against the con
 
 - Flag evaluation. Kaiten implements OFREP, so flags are evaluated with an OpenFeature SDK and
   its generic OFREP provider (`openfeature-provider-ofrep`); the README shows how.
+
+[1.0.0]: https://github.com/kaitencloud/sdk-python/releases/tag/v1.0.0
diff --git a/README.md b/README.md
index af1f845..6cae9d8 100644
--- a/README.md
+++ b/README.md
@@ -796,8 +796,9 @@ a [DCO](DCO.md) sign-off (`git commit -s`). Report a vulnerability privately, as
 
 ## Versioning
 
-The SDK follows [Semantic Versioning](https://semver.org). Until 1.0.0, a minor release may
-change the public API — the [changelog](CHANGELOG.md) says how — and a patch release never does.
+The SDK follows [Semantic Versioning](https://semver.org): only a major release changes the
+public API — the [changelog](CHANGELOG.md) says how — while a minor release adds to it and a
+patch release fixes it.
 
 ## License
 
diff --git a/pyproject.toml b/pyproject.toml
index 546acca..e7a85b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ keywords = [
     "sdk",
 ]
 classifiers = [
-    "Development Status :: 4 - Beta",
+    "Development Status :: 5 - Production/Stable",
     "Framework :: AsyncIO",
     "Intended Audience :: Developers",
     "Operating System :: OS Independent",
diff --git a/src/kaitencloud/_version.py b/src/kaitencloud/_version.py
index 33d4406..bfc8daa 100644
--- a/src/kaitencloud/_version.py
+++ b/src/kaitencloud/_version.py
@@ -1,4 +1,4 @@
 # Copyright 2026 KAITEN INC
 # SPDX-License-Identifier: Apache-2.0
 
-__version__ = "0.1.0"
+__version__ = "1.0.0"