diff --git a/Changelog.txt b/Changelog.txt
index b6988b6..ad06d85 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -14,6 +14,8 @@ found at:
 - [2024.03.21; Maikuolan]: Slightly improved guards for the IPHeader class
   trySource method.
 
+- [2024.05.30; Maikuolan]: PHP 8.4 compatibility patch.
+
 === Version/Release 2.12.0 ===
 MINOR RELEASE.
 
diff --git a/src/Cache.php b/src/Cache.php
index 5271e7a..5977565 100644
--- a/src/Cache.php
+++ b/src/Cache.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * A simple, unified cache handler (last modified: 2023.12.01).
+ * A simple, unified cache handler (last modified: 2024.05.30).
  *
  * This file is a part of the "common classes package", utilised by a number of
  * packages and projects, including CIDRAM and phpMussel.
@@ -187,7 +187,7 @@ class Cache extends CommonAbstract
      * @param array|null $WorkingData An optional array of default cache data.
      * @return void
      */
-    public function __construct(array $WorkingData = null)
+    public function __construct(?array $WorkingData = null)
     {
         if (is_array($WorkingData)) {
             $this->WorkingData = $WorkingData;