diff --git a/ChangeLog-9.2.md b/ChangeLog-9.2.md
index 39d086a79..9ef6be338 100644
--- a/ChangeLog-9.2.md
+++ b/ChangeLog-9.2.md
@@ -2,6 +2,12 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [9.2.31] - 2024-03-02
+
+### Changed
+
+* Do not use implicitly nullable parameters
+
 ## [9.2.30] - 2023-12-22
 
 ### Changed
@@ -505,6 +511,7 @@ All notable changes are documented in this file using the [Keep a CHANGELOG](htt
 
 * This component is no longer supported on PHP 7.1
 
+[9.2.31]: https://github.com/sebastianbergmann/php-code-coverage/compare/9.2.30...9.2.31
 [9.2.30]: https://github.com/sebastianbergmann/php-code-coverage/compare/9.2.29...9.2.30
 [9.2.29]: https://github.com/sebastianbergmann/php-code-coverage/compare/9.2.28...9.2.29
 [9.2.28]: https://github.com/sebastianbergmann/php-code-coverage/compare/9.2.27...9.2.28
diff --git a/src/Node/AbstractNode.php b/src/Node/AbstractNode.php
index 60d6391d3..330fb5736 100644
--- a/src/Node/AbstractNode.php
+++ b/src/Node/AbstractNode.php
@@ -46,7 +46,7 @@ abstract class AbstractNode implements Countable
      */
     private $id;
 
-    public function __construct(string $name, self $parent = null)
+    public function __construct(string $name, ?self $parent = null)
     {
         if (substr($name, -1) === DIRECTORY_SEPARATOR) {
             $name = substr($name, 0, -1);
diff --git a/src/Version.php b/src/Version.php
index 52a67772c..1753a97b2 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -22,7 +22,7 @@ final class Version
     public static function id(): string
     {
         if (self::$version === null) {
-            self::$version = (new VersionId('9.2.30', dirname(__DIR__)))->getVersion();
+            self::$version = (new VersionId('9.2.31', dirname(__DIR__)))->getVersion();
         }
 
         return self::$version;