diff --git a/CHANGELOG.md b/CHANGELOG.md
index c940293..e8224c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.4.0] - 2025-10-05
+
+### Features
+
+- [`4cc3a5b`](https://gitea.pufereq.pl/judas/judas_protocol/commit/4cc3a5bb3a0fce0c4d90958f26fa09a1d638a4b3) **message.py**: add message uuid
+
 ## [0.3.0] - 2025-09-23
 
 ### Features
diff --git a/pyproject.toml b/pyproject.toml
index 44ee7cf..8bf1718 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "uv_build"
 
 [project]
 name = "judas_protocol"
-version = "0.3.0"
+version = "0.4.0"
 description = "The judas protocol"
 readme = "README.md"
 authors = []
diff --git a/uv.lock b/uv.lock
index d12a4e6..4f56c98 100644
--- a/uv.lock
+++ b/uv.lock
@@ -240,7 +240,7 @@ wheels = [
 
 [[package]]
 name = "judas-protocol"
-version = "0.3.0"
+version = "0.4.0"
 source = { editable = "." }
 
 [package.dev-dependencies]