--- a/plugins/mod_external_services.lua	Sun Jul 16 21:04:42 2023 +0200
+++ b/plugins/mod_external_services.lua	Sun Jul 16 20:49:33 2023 +0200
@@ -10,7 +10,7 @@
 local default_host = module:get_option_string("external_service_host", module.host);
 local default_port = module:get_option_number("external_service_port");
 local default_secret = module:get_option_string("external_service_secret");
-local default_ttl = module:get_option_number("external_service_ttl", 86400);
+local default_ttl = module:get_option_period("external_service_ttl", "1 day");
 
 local configured_services = module:get_option_array("external_services", {});