diff --git a/paris-container.nix b/paris-container.nix
index f6b366b..64c4b39 100644
--- a/paris-container.nix
+++ b/paris-container.nix
@@ -280,7 +280,9 @@ in {
                 auth_provider = "ldap";
                 access_provider = "ldap";
 
-                ldap_uri = "ldap://172.16.31.1:${toString cfg.ldap.port}";
+                ldap_uri = "ldap://${head cfg.ldap.listen-ips}:${
+                    toString cfg.ldap.port
+                  }";
                 ldap_schema = "rfc2307bis";
 
                 ldap_search_base = cfg.ldap.base;