diff --git a/src/Export/Base/CsvRenderer.php b/src/Export/Base/CsvRenderer.php
index c45f1096..799d3229 100644
--- a/src/Export/Base/CsvRenderer.php
+++ b/src/Export/Base/CsvRenderer.php
@@ -38,7 +38,7 @@ class CsvRenderer extends AbstractSpreadsheetRenderer
      */
     protected function saveSpreadsheet(Spreadsheet $spreadsheet): string
     {
-        $filename = tempnam(sys_get_temp_dir(), 'kimai-export-csv');
+        $filename = @tempnam(sys_get_temp_dir(), 'kimai-export-csv');
         if (false === $filename) {
             throw new \Exception('Could not open temporary file');
         }
diff --git a/src/Export/Base/XlsxRenderer.php b/src/Export/Base/XlsxRenderer.php
index 789b519d..182aa42b 100644
--- a/src/Export/Base/XlsxRenderer.php
+++ b/src/Export/Base/XlsxRenderer.php
@@ -35,7 +35,7 @@ class XlsxRenderer extends AbstractSpreadsheetRenderer
      */
     protected function saveSpreadsheet(Spreadsheet $spreadsheet): string
     {
-        $filename = tempnam(sys_get_temp_dir(), 'kimai-export-xlsx');
+        $filename = @tempnam(sys_get_temp_dir(), 'kimai-export-xlsx');
         if (false === $filename) {
             throw new \Exception('Could not open temporary file');
         }
diff --git a/src/Export/Spreadsheet/Writer/XlsxWriter.php b/src/Export/Spreadsheet/Writer/XlsxWriter.php
index b3da810e..956a0438 100644
--- a/src/Export/Spreadsheet/Writer/XlsxWriter.php
+++ b/src/Export/Spreadsheet/Writer/XlsxWriter.php
@@ -42,7 +42,7 @@ class XlsxWriter implements WriterInterface
     {
         $options = array_merge(['autofilter' => true, 'freeze' => null], $options);
 
-        $filename = tempnam(sys_get_temp_dir(), 'kimai-export-xlsx');
+        $filename = @tempnam(sys_get_temp_dir(), 'kimai-export-xlsx');
         if (false === $filename) {
             throw new \Exception('Could not open temporary file');
         }
diff --git a/src/Invoice/Renderer/OdsRenderer.php b/src/Invoice/Renderer/OdsRenderer.php
index 8b145fdb..e73dbc6b 100644
--- a/src/Invoice/Renderer/OdsRenderer.php
+++ b/src/Invoice/Renderer/OdsRenderer.php
@@ -38,7 +38,7 @@ final class OdsRenderer extends AbstractSpreadsheetRenderer implements RendererI
      */
     protected function saveSpreadsheet(Spreadsheet $spreadsheet)
     {
-        $filename = tempnam(sys_get_temp_dir(), 'kimai-invoice-ods');
+        $filename = @tempnam(sys_get_temp_dir(), 'kimai-invoice-ods');
         if (false === $filename) {
             throw new \Exception('Could not open temporary file');
         }
diff --git a/src/Invoice/Renderer/XlsxRenderer.php b/src/Invoice/Renderer/XlsxRenderer.php
index 9a0bd84e..69fb3c5b 100644
--- a/src/Invoice/Renderer/XlsxRenderer.php
+++ b/src/Invoice/Renderer/XlsxRenderer.php
@@ -38,7 +38,7 @@ final class XlsxRenderer extends AbstractSpreadsheetRenderer implements Renderer
      */
     protected function saveSpreadsheet(Spreadsheet $spreadsheet)
     {
-        $filename = tempnam(sys_get_temp_dir(), 'kimai-invoice-xlsx');
+        $filename = @tempnam(sys_get_temp_dir(), 'kimai-invoice-xlsx');
         if (false === $filename) {
             throw new \Exception('Could not open temporary file');
         }