diff --git a/tasks/main.yml b/tasks/main.yml
index c8305be..1d0d092 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -38,7 +38,7 @@
 
 - name: set base DN
   ldap_attr:
-    dn: 'olcDatabase=\{{{ldap_database_index|default(1)}}\}mdb,cn=config'
+    dn: 'olcDatabase={{"{"+(ldap_database_index|default(1)|string)+"}"}}mdb,cn=config'
     name: "{{item.key}}"
     state: exact
     values: "{{item.value}}"