diff --git a/roles/common/tasks/postgres_cron.yml b/roles/common/tasks/postgres_cron.yml
index 1d5a4a6..38fab40 100644
--- a/roles/common/tasks/postgres_cron.yml
+++ b/roles/common/tasks/postgres_cron.yml
@@ -55,8 +55,8 @@
     - timescaledb_install
   postgresql_query:
     db: "{{ timescaledb_database_name }}"
-    login_user: "{{ timescaledb_database_user }}"
-    login_password: "{{ timescaledb_database_password }}"
+    login_user: "{{ postgres }}"
+    login_password: "{{ postgresql_admin_password }}"
     login_host: "{{ lxc_ip }}"
     query:
       - CREATE EXTENSION pg_cron;