diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ee3cfe..e7e27f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to this reference implementation are documented here.
 
-## Unreleased
+## 0.3.0 — 2026-07-31
 
 ### Added
 
diff --git a/docs/release-readiness.md b/docs/release-readiness.md
index 13f9224..50c1aad 100644
--- a/docs/release-readiness.md
+++ b/docs/release-readiness.md
@@ -1,4 +1,4 @@
-# Next release readiness
+# 0.3.0 release readiness
 
 This page records the expected release contract, not a publication event.
 Creating a version tag remains a separate maintainer action.
diff --git a/pyproject.toml b/pyproject.toml
index 5cdd335..7a674c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openstatspec"
-version = "0.2.0"
+version = "0.3.0"
 description = "Reference adapter for the OpenStatSpec relational contract"
 readme = "README.md"
 requires-python = ">=3.11"