diff --git a/templates/nextcloud-onlyoffice-config.yaml b/templates/nextcloud-onlyoffice-config.yaml
index 55111373256cfc89d90602f696cb499bdd432161..6706f19fb774eebb23bde8d9f073a4a81f5e4598 100644
--- a/templates/nextcloud-onlyoffice-config.yaml
+++ b/templates/nextcloud-onlyoffice-config.yaml
@@ -131,6 +131,9 @@ data:
       # Extract app into target directory. The app tars usually contain a folder
       # named after the app name
       tar -xf "{{ .name }}.tar.gz" -C "$target_directory"
+      # Ownership in the archive can be anything. Nextcloud wants it to be
+      # www-data.
+      chown -R 33:33 "$target_directory"
       rm "{{ .name }}.tar.gz"
     fi
     {{- else }}