diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0bfa209..dd33ac0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 <!--next-version-placeholder-->
 
+## v2.21.1 (2024-01-16)
+
+### Fix
+
+* Avoid expensive runtime inspection of known callables ([#277](https://github.com/Bluetooth-Devices/dbus-fast/issues/277)) ([`0271825`](https://github.com/Bluetooth-Devices/dbus-fast/commit/0271825e7338dd8422975d9289768363b5b6b9de))
+
 ## v2.21.0 (2023-12-12)
 
 ### Feature
diff --git a/pyproject.toml b/pyproject.toml
index 8aac14a..f8b9753 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dbus-fast"
-version = "2.21.0"
+version = "2.21.1"
 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 f19d3a6..63695c0 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__ = "2.21.0"
+__version__ = "2.21.1"
 __author__ = "Bluetooth Devices authors, Tony Crisci"
 __author_email__ = "bluetooth@koston.org"
 __license__ = "MIT"