diff --git a/composer.json b/composer.json
index 634f518cb..165695fe1 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
         "nettrine/migrations": "^v0.8",
         "nextras/mail-panel": "^v2.5",
         "php-http/guzzle7-adapter": "^1.0",
-        "phpoffice/phpspreadsheet": "^2.0",
+        "phpoffice/phpspreadsheet": "^3.3",
         "ramsey/uuid": "^4.2",
         "sentry/sentry": "^3.4",
         "skaut/dependent-select-box": "dev-master",
diff --git a/composer.lock b/composer.lock
index b633d0a87..2f680e24e 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": "f0daec7a459a4a72967ccc2acfdeab08",
+    "content-hash": "cfe9985cf5d611e2b7aab5e909eef6cc",
     "packages": [
         {
             "name": "beberlei/assert",
@@ -5957,16 +5957,16 @@
         },
         {
             "name": "phpoffice/phpspreadsheet",
-            "version": "2.2.2",
+            "version": "3.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
-                "reference": "ffbcee68069b073bff07a71eb321dcd9f2763513"
+                "reference": "87ddd21eb0b6b7ad20a11d314348ef307475f547"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/ffbcee68069b073bff07a71eb321dcd9f2763513",
-                "reference": "ffbcee68069b073bff07a71eb321dcd9f2763513",
+                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/87ddd21eb0b6b7ad20a11d314348ef307475f547",
+                "reference": "87ddd21eb0b6b7ad20a11d314348ef307475f547",
                 "shasum": ""
             },
             "require": {
@@ -6055,9 +6055,9 @@
             ],
             "support": {
                 "issues": "https://github.com/PHPOffice/PhpSpreadsheet/issues",
-                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/2.2.2"
+                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/3.3.0"
             },
-            "time": "2024-08-08T02:31:26+00:00"
+            "time": "2024-09-29T07:04:07+00:00"
         },
         {
             "name": "phpoption/phpoption",