diff --git a/CHANGELOG.md b/CHANGELOG.md
index c047dc0..3df611d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,18 +6,27 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+[Unreleased]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/compare/v1.3.0...HEAD
+
+## [1.3.1] - 2021-08-13
+
 ### Added
 
 - Extend by the Code Climate output format [#50] from [@lukas9393]. 
 
+### Fixed
+
+- PHP 8.1: silence the deprecation notices about missing return types [#64] from [@jrfnl].
+
 ### Internal
 
 - Reformat changelog to use reflinks in changelog entries [#58] from [@glensc].
 
-[Unreleased]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/compare/v1.3.0...HEAD
+[1.3.1]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/compare/v1.3.0...1.3.1
 
 [#50]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/pull/50
 [#58]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/pull/58
+[#64]: https://github.com/php-parallel-lint/PHP-Parallel-Lint/pull/64
 
 ## [1.3.0] - 2021-04-07
 
diff --git a/src/Application.php b/src/Application.php
index 836f335..4b4017e 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -4,7 +4,7 @@
 
 class Application
 {
-    const VERSION = '1.3.0';
+    const VERSION = '1.3.1';
 
     // Return codes
     const SUCCESS = 0,