diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa532e3..a6c8bfd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 <!--next-version-placeholder-->
 
+## v1.40.0 (2022-10-10)
+### Feature
+* Speed up unmarshaller ([#101](https://github.com/Bluetooth-Devices/dbus-fast/issues/101)) ([`a6a248b`](https://github.com/Bluetooth-Devices/dbus-fast/commit/a6a248b3b1dbbb06784f700b49a7fe92b30cc7b5))
+
 ## v1.39.0 (2022-10-10)
 ### Feature
 * Add additional typing ([#100](https://github.com/Bluetooth-Devices/dbus-fast/issues/100)) ([`cde1893`](https://github.com/Bluetooth-Devices/dbus-fast/commit/cde1893dca1872d8b482a145337ee3bbf47c35b4))
diff --git a/pyproject.toml b/pyproject.toml
index e958f94..04ef48a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dbus-fast"
-version = "1.39.0"
+version = "1.40.0"
 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 eddf47a..6bc04e7 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__ = "1.39.0"
+__version__ = "1.40.0"
 __author__ = "Bluetooth Devices authors, Tony Crisci"
 __author_email__ = "bluetooth@koston.org"
 __license__ = "MIT"