diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02af4d9..49203ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,12 +4,16 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-# [2.2.1] - Not Released
+# [2.2.1] - 2025-03-01
 
 ### Added
 
 - Added private key function.
 
+### Fixed
+
+- Error extracting functions (symbols) for old libraries.
+
 ## [2.2.0] - 2025-01-19
 
 ### Added
diff --git a/keydive/__init__.py b/keydive/__init__.py
index 1589c41..3251fa3 100644
--- a/keydive/__init__.py
+++ b/keydive/__init__.py
@@ -4,4 +4,4 @@ from .cdm import Cdm
 from .vendor import Vendor
 from .keybox import Keybox
 
-__version__ = "2.2.0"
+__version__ = "2.2.1"
diff --git a/pyproject.toml b/pyproject.toml
index 22a45e2..0139f53 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "keydive"
-version = "2.2.0"
+version = "2.2.1"
 description = "Extract Widevine L3 keys from Android devices effortlessly, spanning multiple Android versions for DRM research and education."
 license = "MIT"
 authors = ["hyugogirubato <65763543+hyugogirubato@users.noreply.github.com>"]