diff --git a/apps/qubit/modules/object/actions/importSelectAction.class.php b/apps/qubit/modules/object/actions/importSelectAction.class.php
index 78d32032d7..497ffdd3c4 100644
--- a/apps/qubit/modules/object/actions/importSelectAction.class.php
+++ b/apps/qubit/modules/object/actions/importSelectAction.class.php
@@ -179,7 +179,13 @@ protected function doBackgroundImport($request)
             $this->redirect($importSelectRoute);
         }
 
-        // Redirect user if they are attempting to upload an invalid CSV file
+        // Redirect user if they are attempting to upload an invalid CSV/XML file
+        if ('xml' == $importType && 'xml' !== strtolower(pathinfo($file['name'], PATHINFO_EXTENSION))) {
+            $errorMessage = $this->context->i18n->__('Not an XML file.');
+            $this->context->user->setFlash('error', $errorMessage);
+            $this->redirect($importSelectRoute);
+        }
+
         if ('csv' == $importType && !$this->checkForValidCsvFile($request, $file['tmp_name'])) {
             $errorMessage = $this->context->i18n->__('Not a CSV file (or CSV columns not recognized).');
             $this->context->user->setFlash('error', $errorMessage);
diff --git a/apps/qubit/modules/object/actions/validateCsvAction.class.php b/apps/qubit/modules/object/actions/validateCsvAction.class.php
index 4c1cda6897..bd763c84f4 100644
--- a/apps/qubit/modules/object/actions/validateCsvAction.class.php
+++ b/apps/qubit/modules/object/actions/validateCsvAction.class.php
@@ -73,6 +73,12 @@ protected function doBackgroundValidate($request)
             $this->redirect($validateCsvRoute);
         }
 
+        if ('csv' !== strtolower(pathinfo($file['name'], PATHINFO_EXTENSION))) {
+            $errorMessage = $this->context->i18n->__('Not a CSV file.');
+            $this->context->user->setFlash('error', $errorMessage);
+            $this->redirect($validateCsvRoute);
+        }
+
         // if we got here without a file upload, go to file selection
         if (0 == count($file) || empty($file['tmp_name'])) {
             $this->redirect($validateCsvRoute);
@@ -83,7 +89,7 @@ protected function doBackgroundValidate($request)
             // Choose import type based on importType parameter
             // This decision used to be based in the file extension but some users
             // experienced problems when the extension was omitted
-            'importType' => $importType,
+            'importType' => 'csv',
             'file' => $file,
         ];
 
diff --git a/apps/qubit/modules/object/templates/importSelectSuccess.php b/apps/qubit/modules/object/templates/importSelectSuccess.php
index 50461ce113..b826561ef7 100644
--- a/apps/qubit/modules/object/templates/importSelectSuccess.php
+++ b/apps/qubit/modules/object/templates/importSelectSuccess.php
@@ -158,8 +158,9 @@
         <div id="file-collapse" class="accordion-collapse collapse show" aria-labelledby="file-heading">
           <div class="accordion-body">
             <div class="mb-3">
+              <?php 'csv' == $type ? $acceptedType = '.csv' : $acceptedType = '.xml'; ?>
               <label for="import-file" class="form-label"><?php echo __('Select a file to import'); ?></label>
-              <input class="form-control" type="file" id="import-file" name="file">
+              <input class="form-control" type="file" id="import-file" name="file" accept="<?php echo $acceptedType; ?>">
             </div>
           </div>
         </div>
diff --git a/apps/qubit/modules/object/templates/validateCsvSuccess.php b/apps/qubit/modules/object/templates/validateCsvSuccess.php
index 8b1c576776..2500617774 100644
--- a/apps/qubit/modules/object/templates/validateCsvSuccess.php
+++ b/apps/qubit/modules/object/templates/validateCsvSuccess.php
@@ -45,7 +45,7 @@
           <div class="accordion-body">
             <div class="mb-3">
               <label for="file-input" class="form-label"><?php echo __('Select a CSV file to validate'); ?></label>
-              <input class="form-control" type="file" id="file-input" name="file">
+              <input class="form-control" type="file" id="file-input" name="file" accept=".csv">
             </div>
           </div>
         </div>
diff --git a/plugins/sfSkosPlugin/modules/sfSkosPlugin/actions/importAction.class.php b/plugins/sfSkosPlugin/modules/sfSkosPlugin/actions/importAction.class.php
index 970e6d9a07..64d7f51b8b 100644
--- a/plugins/sfSkosPlugin/modules/sfSkosPlugin/actions/importAction.class.php
+++ b/plugins/sfSkosPlugin/modules/sfSkosPlugin/actions/importAction.class.php
@@ -63,7 +63,7 @@ protected function addField($name)
     {
         switch ($name) {
             case 'file':
-                $this->form->setWidget('file', new sfWidgetFormInputFile());
+                $this->form->setWidget('file', new sfWidgetFormInputFile([], ['accept' => '.skos,.rdf,.xml,.ttl']));
                 $this->form->setValidator('file', new sfValidatorFile());
 
                 break;