diff --git a/roles/xmpp_server/tasks/main.yml b/roles/xmpp_server/tasks/main.yml
index ed6b45a5bdf1f11d1993bc6bf7046547b062a378..0ecc11151c65e44dc7c97e68a7991ccdb127e120 100644
--- a/roles/xmpp_server/tasks/main.yml
+++ b/roles/xmpp_server/tasks/main.yml
@@ -13,7 +13,12 @@
     mode: 0644
   register: backports_repository_configuration
 
-- name: Update apt cache if backports repository configuration changed (for immediate use)
+- name: Update apt cache if backports repository configuration changed (for immediate use)  # noqa 503
+  # [503] Tasks that run when changed should likely be handlers
+  #   Since apt_repository module is not reliable (does not deploy
+  #   change when changing distro version etc), we have to use
+  #   template instead, but this also means we need to trigger the apt
+  #   cache reload by hand.
   apt:
     update_cache: true
   when: backports_repository_configuration.changed