diff --git a/.bumpversion.toml b/.bumpversion.toml
index 49de31e..33ed5b2 100644
--- a/.bumpversion.toml
+++ b/.bumpversion.toml
@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [tool.bumpversion]
-current_version = "0.8.3"
+current_version = "0.8.4"
 
 [[tool.bumpversion.files]]
 filename = "CITATION.cff"
diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 4a7acab..97f6c07 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -14,7 +14,7 @@ All notable changes to this project will be documented in this file.
 The format is based on https://keepachangelog.com/[Keep a Changelog], and this
 project adheres to https://semver.org/[Semantic Versioning].
 
-== {compare-url}/v0.8.3\...HEAD[Unreleased]
+== {compare-url}/v0.8.3\...v0.8.4[0.8.4] - 2024-10-31
 
 === Added
 
diff --git a/CITATION.cff b/CITATION.cff
index d093dde..5abf40c 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -8,8 +8,8 @@ cff-version: 1.2.0
 message: Please cite this software using these meta data.
 
 # Version information.
-date-released: 2024-10-30
-version: 0.8.3
+date-released: 2024-10-31
+version: 0.8.4
 
 # Project information.
 abstract: The system exit codes as defined by <sysexits.h> for Rust
diff --git a/Cargo.lock b/Cargo.lock
index d345802..4c3227e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -386,7 +386,7 @@ dependencies = [
 
 [[package]]
 name = "sysexits"
-version = "0.8.3"
+version = "0.8.4"
 dependencies = [
  "clap",
  "proptest",
diff --git a/Cargo.toml b/Cargo.toml
index 2b9f3da..48aef5c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@
 
 [package]
 name = "sysexits"
-version = "0.8.3"
+version = "0.8.4"
 authors = ["Shun Sakai <sorairolake@protonmail.ch>"]
 edition = "2021"
 rust-version = "1.74.0"
diff --git a/README.md b/README.md
index 4bcee7f..be21047 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-sysexits = "0.8.3"
+sysexits = "0.8.4"
 ```
 
 ### Crate features
diff --git a/src/lib.rs b/src/lib.rs
index 10e448b..bbfb2ba 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -42,7 +42,7 @@
 //! [`<sysexits.h>`]: https://man.openbsd.org/sysexits
 
 #![cfg_attr(feature = "extended_io_error", feature(io_error_more))]
-#![doc(html_root_url = "https://docs.rs/sysexits/0.8.3/")]
+#![doc(html_root_url = "https://docs.rs/sysexits/0.8.4/")]
 #![no_std]
 #![cfg_attr(docsrs, feature(doc_auto_cfg, doc_cfg))]
 // Lint levels of rustc.