diff --git a/includes/Traits/Version_Utils.php b/includes/Traits/Version_Utils.php
index 5617b54bc..7594f5d5c 100644
--- a/includes/Traits/Version_Utils.php
+++ b/includes/Traits/Version_Utils.php
@@ -10,14 +10,14 @@
 /**
  * Trait for version utilities.
  *
- * @since 1.4.0
+ * @since 1.3.1
  */
 trait Version_Utils {
 
 	/**
 	 * Returns current major WordPress version.
 	 *
-	 * @since 1.4.0
+	 * @since 1.3.1
 	 *
 	 * @return string Stable WordPress version.
 	 */
@@ -37,7 +37,7 @@ protected function get_wordpress_stable_version(): string {
 	/**
 	 * Returns WordPress latest version.
 	 *
-	 * @since 1.4.0
+	 * @since 1.3.1
 	 *
 	 * @return string WordPress latest version.
 	 */
@@ -50,7 +50,7 @@ protected function get_wordpress_latest_version(): string {
 	/**
 	 * Returns relative WordPress major version.
 	 *
-	 * @since 1.4.0
+	 * @since 1.3.1
 	 *
 	 * @param string $version WordPress major version.
 	 * @param int    $steps   Steps to find relative version. Defaults to 1 for next major version.
@@ -69,7 +69,7 @@ protected function get_wordpress_relative_major_version( string $version, int $s
 	/**
 	 * Returns specific information.
 	 *
-	 * @since 1.4.0
+	 * @since 1.3.1
 	 *
 	 * @param string $key The information key to retrieve.
 	 * @return mixed The requested information.
diff --git a/plugin.php b/plugin.php
index 7b3f6b0a3..89cca4dc5 100644
--- a/plugin.php
+++ b/plugin.php
@@ -5,7 +5,7 @@
  * Description: Plugin Check is a WordPress.org tool which provides checks to help plugins meet the directory requirements and follow various best practices.
  * Requires at least: 6.3
  * Requires PHP: 7.4
- * Version: 1.3.0
+ * Version: 1.3.1
  * Author: WordPress Performance Team and Plugin Review Team
  * License: GPLv2 or later
  * License URI: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
@@ -16,7 +16,7 @@
 
 use WordPress\Plugin_Check\Plugin_Main;
 
-define( 'WP_PLUGIN_CHECK_VERSION', '1.3.0' );
+define( 'WP_PLUGIN_CHECK_VERSION', '1.3.1' );
 define( 'WP_PLUGIN_CHECK_MINIMUM_PHP', '7.4' );
 define( 'WP_PLUGIN_CHECK_MAIN_FILE', __FILE__ );
 define( 'WP_PLUGIN_CHECK_PLUGIN_DIR_PATH', plugin_dir_path( WP_PLUGIN_CHECK_MAIN_FILE ) );
diff --git a/readme.txt b/readme.txt
index e83f78c8d..1cfc7d85a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 
 Contributors:      wordpressdotorg
 Tested up to:      6.7
-Stable tag:        1.3.0
+Stable tag:        1.3.1
 License:           GPLv2 or later
 License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 Tags:              plugin best practices, testing, accessibility, performance, security
@@ -68,6 +68,13 @@ In any case, passing the checks in this tool likely helps to achieve a smooth pl
 
 == Changelog ==
 
+= 1.3.1 =
+
+* Enhancement - Add version utilities.
+* Fix - Escape error messages.
+* Fix - Renamed error type to ERROR_LOW_SEVERITY and WARNING_LOW_SEVERITY.
+* Fix - Fix PHPCS checks on unwritable filesystems.
+
 = 1.3.0 =
 
 * Enhancement - Update disallowed domains for Plugin URI check.