diff --git a/src/Controller/Admin/Asset/AssetController.php b/src/Controller/Admin/Asset/AssetController.php
index 2e93cf14..ab7e6a14 100644
--- a/src/Controller/Admin/Asset/AssetController.php
+++ b/src/Controller/Admin/Asset/AssetController.php
@@ -988,7 +988,7 @@ public function downloadAction(Request $request): StreamedResponse
             fpassthru($stream);
         }, 200, [
             'Content-Type' => $asset->getMimeType(),
-            'Content-Disposition' => sprintf('attachment; filename: "%s"', $asset->getFilename()),
+            'Content-Disposition' => sprintf('attachment; filename="%s"', $asset->getFilename()),
             'Content-Length' => $asset->getFileSize(),
         ]);
     }
diff --git a/src/Controller/Admin/DataObject/ClassController.php b/src/Controller/Admin/DataObject/ClassController.php
index c73ae76a..2bd78f92 100644
--- a/src/Controller/Admin/DataObject/ClassController.php
+++ b/src/Controller/Admin/DataObject/ClassController.php
@@ -643,7 +643,7 @@ public function exportClassAction(Request $request): Response
 
         $response = new Response($json);
         $response->headers->set('Content-type', 'application/json');
-        $response->headers->set('Content-Disposition', 'attachment; filename: "class_' . $class->getName() . '_export.json"');
+        $response->headers->set('Content-Disposition', 'attachment; filename="class_' . $class->getName() . '_export.json"');
 
         return $response;
     }
@@ -661,7 +661,7 @@ public function exportCustomLayoutDefinitionAction(Request $request): Response
 
                 $response = new Response($json);
                 $response->headers->set('Content-type', 'application/json');
-                $response->headers->set('Content-Disposition', 'attachment; filename: "custom_definition_' . $name . '_export.json"');
+                $response->headers->set('Content-Disposition', 'attachment; filename="custom_definition_' . $name . '_export.json"');
 
                 return $response;
             }
diff --git a/src/Controller/Admin/DataObject/QuantityValueController.php b/src/Controller/Admin/DataObject/QuantityValueController.php
index c1bab143..9bd3971e 100644
--- a/src/Controller/Admin/DataObject/QuantityValueController.php
+++ b/src/Controller/Admin/DataObject/QuantityValueController.php
@@ -59,7 +59,7 @@ public function unitExportAction(Request $request): Response
         $result = $this->service->generateDefinitionJson();
         $response = new Response($result);
         $response->headers->set('Content-Type', 'application/json');
-        $response->headers->set('Content-Disposition', 'attachment;filename: "quantityvalue_unit_export.json"');
+        $response->headers->set('Content-Disposition', 'attachment; filename="quantityvalue_unit_export.json"');
 
         return $response;
     }
diff --git a/src/Controller/Admin/TranslationController.php b/src/Controller/Admin/TranslationController.php
index 69e87ff7..78c0e9f5 100644
--- a/src/Controller/Admin/TranslationController.php
+++ b/src/Controller/Admin/TranslationController.php
@@ -262,7 +262,7 @@ public function exportAction(Request $request): Response
         $response = new Response("\xEF\xBB\xBF" . $csv);
         $response->headers->set('Content-Encoding', 'UTF-8');
         $response->headers->set('Content-Type', 'text/csv; charset=UTF-8');
-        $response->headers->set('Content-Disposition', 'attachment; filename: "export_' . $domain . '_translations.csv"');
+        $response->headers->set('Content-Disposition', 'attachment; filename="export_' . $domain . '_translations.csv"');
         ini_set('display_errors', '0'); //to prevent warning messages in csv
 
         return $response;