diff --git a/CHANGELOG.md b/CHANGELOG.md
index 924b5a8..123a506 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,24 @@ 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).
 
+## [3.3.1] - 2024-07-15
+
+### Added
+
+- Added `from_pdf` method to convert `.pdf` files to `.cbz`.
+
+### Changed
+
+- Set a default standard size.
+- Changed a keyboard shortcut that prevented copying information.
+
+### Fixed
+
+- Fixed the icon display for Linux in the player.
+- Fixed the taskbar icon for Windows in the player.
+- Fixed the player margins.
+- Automatically detect the player size based on the smallest image.
+
 ## [3.3.0] - 2024-07-14
 
 ### Added
@@ -82,6 +100,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - Initial release.
 
+[3.3.1]: https://github.com/hyugogirubato/cbz/releases/tag/v3.3.1
 [3.3.0]: https://github.com/hyugogirubato/cbz/releases/tag/v3.3.0
 [3.2.0]: https://github.com/hyugogirubato/cbz/releases/tag/v3.2.0
 [3.1.2]: https://github.com/hyugogirubato/cbz/releases/tag/v3.1.2
diff --git a/pyproject.toml b/pyproject.toml
index 2ccfbe6..46b50d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "cbz"
-version = "3.3.0"
+version = "3.3.1"
 description = "CBZ simplifies creating, managing, and viewing comic book files in CBZ format, offering seamless packaging, metadata handling, and built-in viewing capabilities"
 license = "MIT"
 authors = ["hyugogirubato <65763543+hyugogirubato@users.noreply.github.com>"]
@@ -34,7 +34,7 @@ python = "^3.8"
 xmltodict = "^0.13.0"
 langcodes = "^3.4.0"
 Pillow = "^10.4.0"
-PyMuPDF  = "^1.24.7"
+PyMuPDF = "^1.24.7"
 
 [tool.poetry.scripts]
 cbzplayer = "cbz.__main__:main"