diff --git a/composer.lock b/composer.lock
index 41fcfab76..a797eb749 100644
--- a/composer.lock
+++ b/composer.lock
@@ -332,16 +332,16 @@
         },
         {
             "name": "phpoffice/phpspreadsheet",
-            "version": "5.9.0",
+            "version": "5.10.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
-                "reference": "05e99ebf61238a70227b4d9cc02d0030d34f6339"
+                "reference": "eb18727acf6b1f4cc67145a52ab04f9fd4c28d53"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/05e99ebf61238a70227b4d9cc02d0030d34f6339",
-                "reference": "05e99ebf61238a70227b4d9cc02d0030d34f6339",
+                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/eb18727acf6b1f4cc67145a52ab04f9fd4c28d53",
+                "reference": "eb18727acf6b1f4cc67145a52ab04f9fd4c28d53",
                 "shasum": ""
             },
             "require": {
@@ -370,6 +370,7 @@
                 "dealerdirect/phpcodesniffer-composer-installer": "dev-main",
                 "dompdf/dompdf": "^2.0 || ^3.0",
                 "ext-intl": "*",
+                "ext-openssl": "*",
                 "friendsofphp/php-cs-fixer": "^3.2",
                 "mitoteam/jpgraph": "^10.5",
                 "mpdf/mpdf": "^8.1.1",
@@ -379,11 +380,12 @@
                 "phpstan/phpstan-phpunit": "^1.0 || ^2.0",
                 "phpunit/phpunit": "^10.5 || ^11.0",
                 "squizlabs/php_codesniffer": "^3.7",
-                "tecnickcom/tcpdf": "^6.5"
+                "tecnickcom/tcpdf": ">=6.8.0 <7.0.0"
             },
             "suggest": {
                 "dompdf/dompdf": "Option for rendering PDF with PDF Writer",
                 "ext-intl": "PHP Internationalization Functions, required for NumberFormat Wizard and StringHelper::setLocale()",
+                "ext-openssl": "Handline Agile-encrypted Xlsx spreadsheets",
                 "mitoteam/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers",
                 "mpdf/mpdf": "Option for rendering PDF with PDF Writer",
                 "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer"
@@ -435,9 +437,9 @@
             ],
             "support": {
                 "issues": "https://github.com/PHPOffice/PhpSpreadsheet/issues",
-                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/5.9.0"
+                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/5.10.0"
             },
-            "time": "2026-07-12T19:17:39+00:00"
+            "time": "2026-09-17T03:54:50+00:00"
         },
         {
             "name": "psr/http-message",