diff --git a/base/config/01-base.config.php b/base/config/01-base.config.php
index dcb096774fdf9b5d933c82a575b3f46e1ef1d02b..5939d83bbb965c26e265a9d76dad225bafba547f 100644
--- a/base/config/01-base.config.php
+++ b/base/config/01-base.config.php
@@ -20,4 +20,7 @@ $CONFIG = array (
   // sharing https://github.com/nextcloud/server/blob/master/config/config.sample.php#L1458-L1475
   'sharing.maxAutocompleteResults' => 10,
   'sharing.minSearchStringLength' => 2,
-);
\ No newline at end of file
+  // https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/config_sample_php_parameters.html#deleted-items-trash-bin
+  // delete all files in the trash bin that are older than 30 days automatically, delete other files anytime if space needed (trash takes more than 50% of quota)
+  'trashbin_retention_obligation' => 'auto,30',
+);