diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c36355..68056c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-10-04
+
 ### Changed
 
 - **BREAKING**: **Execution**: Use TopoGen `3bf0fa4a` and NetGraph `>=0.24.0` through their Python APIs, with a local process queue. TopoGen and NetGraph executable overrides are removed.
diff --git a/pyproject.toml b/pyproject.toml
index ca5f735..b3fe063 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "netlab"
-version = "0.3.0"
+version = "0.4.0"
 description = "Metrics and analysis tools for NetGraph scenarios."
 readme = "README.md"
 authors = [{ name = "Andrey Golovanov" }]