diff --git a/roles/moodle/tasks/main.yml b/roles/moodle/tasks/main.yml
index 6543fda72..080d0c318 100644
--- a/roles/moodle/tasks/main.yml
+++ b/roles/moodle/tasks/main.yml
@@ -106,6 +106,7 @@
   postgresql_user:
     name: Admin
     password: changeme
+    encrypted: yes   # Required by PostgresSQL 10.3+ e.g. on Ubuntu 18.04
     role_attr_flags: NOSUPERUSER,NOCREATEROLE,NOCREATEDB
     state: present
   become: yes