diff --git a/templates/multinode/proxysql.cnf.erb b/templates/multinode/proxysql.cnf.erb
index 29ff693..97cd3fb 100644
--- a/templates/multinode/proxysql.cnf.erb
+++ b/templates/multinode/proxysql.cnf.erb
@@ -120,6 +120,6 @@ mysql_users =
 (
 
 <%- @customers.each do |index, customer| -%>
-    { username = "nextcloud_<%= customer %>", password = "<%= hiera(customer + '_mysql_user_password') %>", default_hostgroup = 10, transaction_persistent = <%= @transaction_persistent %>, active = 1 },
+    { username = "nextcloud_<%= customer %>", password = "<%= hiera(customer.to_s + '_mysql_user_password') %>", default_hostgroup = 10, transaction_persistent = <%= @transaction_persistent %>, active = 1 },
 <%- end -%>
 )