diff --git a/CHANGELOG.md b/CHANGELOG.md
index dbcc281..36e2c7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-06-16
+
 ### Added
 
 - `hotdata.query.QueryApi`: enhanced query client that transparently retries
@@ -27,7 +29,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   query contract needs. The raw generated classes remain importable from
   `hotdata.api.query_api` / `hotdata.api.results_api`.
 
-
 ## [0.3.4] - 2026-06-15
 
 ### Changed
diff --git a/pyproject.toml b/pyproject.toml
index da875cf..6536523 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "hotdata"
-version = "0.3.4"
+version = "0.4.0"
 description = "Hotdata API"
 authors = [
   {name = "Hotdata",email = "developers@hotdata.dev"},