diff --git a/nextcloud/helmrelease-nextcloud.yaml b/nextcloud/helmrelease-nextcloud.yaml
index 33df694..c4d5f31 100644
--- a/nextcloud/helmrelease-nextcloud.yaml
+++ b/nextcloud/helmrelease-nextcloud.yaml
@@ -52,6 +52,29 @@ spec:
             ),
             'forwarded_for_headers' => array('HTTP_X_FORWARDED_FOR'),
           );
+        sqlite.config.php: |-
+          <?php
+          $CONFIG = array (
+            'sqlite.journal_mode' => 'WAL',
+          );
+        previews.config.php: |-
+          <?php
+          $CONFIG = array (
+            'enable_previews' => true,
+            'enabledPreviewProviders' => array (
+              'OC\Preview\Movie',
+              'OC\Preview\PNG',
+              'OC\Preview\JPEG',
+              'OC\Preview\GIF',
+              'OC\Preview\BMP',
+              'OC\Preview\XBitmap',
+              'OC\Preview\MP3',
+              'OC\Preview\MP4',
+              'OC\Preview\TXT',
+              'OC\Preview\MarkDown',
+              'OC\Preview\PDF'
+            ),
+          );
 
     internalDatabase:
       enabled: false