diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5aed1ad..7b5ee6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 <!--next-version-placeholder-->
 
+## v1.4.0 (2022-09-10)
+### Feature
+* Improve unmarshalling performance ([#18](https://github.com/Bluetooth-Devices/dbus-fast/issues/18)) ([`4362b93`](https://github.com/Bluetooth-Devices/dbus-fast/commit/4362b93fc84406adfa026b6573bc076327c71c5b))
+
 ## v1.3.0 (2022-09-09)
 ### Feature
 * Improve callback performance ([#16](https://github.com/Bluetooth-Devices/dbus-fast/issues/16)) ([`aee3da9`](https://github.com/Bluetooth-Devices/dbus-fast/commit/aee3da9f20c36cf6379d1e69e63f33a88592f6fd))
diff --git a/pyproject.toml b/pyproject.toml
index 84bf30b..55d73f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dbus-fast"
-version = "1.3.0"
+version = "1.4.0"
 description = "A faster version of dbus-next"
 authors = ["Bluetooth Devices Authors <bluetooth@koston.org>"]
 license = "MIT"
diff --git a/src/dbus_fast/__version__.py b/src/dbus_fast/__version__.py
index b49fd41..5f47954 100644
--- a/src/dbus_fast/__version__.py
+++ b/src/dbus_fast/__version__.py
@@ -3,7 +3,7 @@ __description__ = (
     "A performant zero-dependency DBus library for Python with asyncio support"
 )
 __url__ = "https://github.com/bluetooth-devices/dbus-fast"
-__version__ = "1.3.0"
+__version__ = "1.4.0"
 __author__ = "Bluetooth Devices authors, Tony Crisci"
 __author_email__ = "bluetooth@koston.org"
 __license__ = "MIT"