diff --git a/README b/README
index 52a83b0..00e8c24 100644
--- a/README
+++ b/README
@@ -28,6 +28,7 @@ offers ansible playbooks and instructions for the following machines:
      - setup of a home cloud server
      - dynamic DNS name
      - nextcloud
+     - backup with borg
      - …
 
 Contributions like patches, suggestions, pull requests and/or further
diff --git a/roles/nextcloud/tasks/main.yml b/roles/nextcloud/tasks/main.yml
index ea46e31..e620a54 100644
--- a/roles/nextcloud/tasks/main.yml
+++ b/roles/nextcloud/tasks/main.yml
@@ -234,7 +234,7 @@
     warn: False
   register: cmd_result
   changed_when: cmd_result.stdout is not search('Nothing to do.')
-  when: allow_download
+  when: allow_download|bool
 
 ## app updates and installations:
 - name: update apps
@@ -244,7 +244,7 @@
     warn: False
   register: cmd_result
   changed_when: cmd_result.stdout | length > 0
-  when: allow_download
+  when: allow_download|bool
 
 - name: install extra apps
   command: "sudo -u www-data php ./occ app:install {{ item }}"
@@ -255,7 +255,16 @@
   register: cmd_result
   changed_when: cmd_result.stdout is not search('already installed')
   failed_when:  cmd_result.stdout is not search('already installed') and cmd_result.rc != 0
-  when: allow_download
+  when: allow_download|bool or run_in_installer|default(false)|bool
+
+## nextcloud maintenance
+- name: add missing indices
+  command: "sudo -u www-data php ./occ db:add-missing-indices"
+  args:
+    chdir: "{{ nc_dir }}"
+    warn: False
+  register: cmd_result
+  changed_when: cmd_result.stdout is search('table updated successfully')
 
 
 - name: add default NIC to public zone