diff --git a/lib/phpspreadsheet/readme_moodle.txt b/lib/phpspreadsheet/readme_moodle.txt
index 4dd2ec66eae..2af6a20758f 100644
--- a/lib/phpspreadsheet/readme_moodle.txt
+++ b/lib/phpspreadsheet/readme_moodle.txt
@@ -4,7 +4,7 @@ Last release package can be found in https://github.com/PHPOffice/PhpSpreadsheet
 
 NOTICE:
  * Before running composer command, make sure you have the composer version updated.
- * Composer version 2.5.1 2022-12-22 15:33:54
+ * Composer version 2.5.5 2023-03-21 11:50:05
 
 STEPS:
  * Create a temporary folder outside your moodle installation
diff --git a/lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/File.php b/lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/File.php
index 737a6eb5912..ca22e6ca2be 100644
--- a/lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/File.php
+++ b/lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/File.php
@@ -114,6 +114,12 @@ class File
      */
     public static function sysGetTempDir(): string
     {
+        // Moodle hack!
+        if (function_exists('make_temp_directory')) {
+            $temp = make_temp_directory('phpspreadsheet');
+            return realpath(dirname($temp));
+        }
+
         $path = sys_get_temp_dir();
         if (self::$useUploadTempDirectory) {
             //  use upload-directory when defined to allow running on environments having very restricted
diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index def423fb6c5..144130ebf65 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -54,7 +54,7 @@
     <location>phpspreadsheet</location>
     <name>PhpSpreadsheet</name>
     <description>Library to read, write and create spreadsheet documents in PHP.</description>
-    <version>1.28.0</version>
+    <version>1.29.0</version>
     <license>MIT</license>
     <repository>https://github.com/PHPOffice/PhpSpreadsheet</repository>
     <customised/>