diff --git a/composer.json b/composer.json
index 8f4cf7d31..c726f8422 100644
--- a/composer.json
+++ b/composer.json
@@ -52,7 +52,7 @@
         "ublaboo/mailing": "^1.2",
 
         "jms/serializer": "^3.28",
-        "phpoffice/phpspreadsheet": "^2.0",
+        "phpoffice/phpspreadsheet": "^3.4",
         "contributte/pdf": "^7.0",
         "mpdf/qrcode": "^1.2",
         "dfridrich/qr-platba": "^2.0",
diff --git a/composer.lock b/composer.lock
index 02b37429f..83a76786f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9c71af405801cb09da2e935ff046c51c",
+    "content-hash": "cd1a95b97d9b8fd1222410619f2c4a54",
     "packages": [
         {
             "name": "azuyalabs/yasumi",
@@ -5562,16 +5562,16 @@
         },
         {
             "name": "phpoffice/phpspreadsheet",
-            "version": "2.3.2",
+            "version": "3.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
-                "reference": "08d4e08cf0c7e6182750cef7958b860b8c7f10ad"
+                "reference": "eec07c20b51cc785295a6feef81ada7feda755e7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/08d4e08cf0c7e6182750cef7958b860b8c7f10ad",
-                "reference": "08d4e08cf0c7e6182750cef7958b860b8c7f10ad",
+                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/eec07c20b51cc785295a6feef81ada7feda755e7",
+                "reference": "eec07c20b51cc785295a6feef81ada7feda755e7",
                 "shasum": ""
             },
             "require": {
@@ -5660,9 +5660,9 @@
             ],
             "support": {
                 "issues": "https://github.com/PHPOffice/PhpSpreadsheet/issues",
-                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/2.3.2"
+                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/3.4.0"
             },
-            "time": "2024-11-10T09:35:47+00:00"
+            "time": "2024-11-10T10:10:41+00:00"
         },
         {
             "name": "phpstan/phpdoc-parser",