diff --git a/source/main.ts b/source/main.ts
index 920cb76..e4705a1 100644
--- a/source/main.ts
+++ b/source/main.ts
@@ -366,8 +366,10 @@ async function main(
 		);
 	}
 	else {
-		switch (args["action"]) {
-			default: {
+		switch (args["action"])
+		{
+			default:
+			{
 				lib_plankton.log.error(
 					"main_invalid_action",
 					{
@@ -376,7 +378,8 @@ async function main(
 				);
 				break;
 			}
-			case "conf-schema": {
+			case "conf-schema":
+			{
 				process.stdout.write(
 					JSON.stringify(
 						_zeitbild.conf.schema(),
@@ -388,7 +391,8 @@ async function main(
 				);
 				break;
 			}
-			case "conf-expose": {
+			case "conf-expose":
+			{
 				process.stdout.write(
 					JSON.stringify(
 						_zeitbild.conf.get(),
@@ -400,7 +404,8 @@ async function main(
 				);
 				break;
 			}
-			case "api-doc": {
+			case "api-doc":
+			{
 				lib_plankton.log.set_main_logger([]);
 				const rest_subject : lib_plankton.rest_http.type_rest = _zeitbild.api.make();
 				process.stdout.write(
@@ -412,7 +417,8 @@ async function main(
 				);
 				break;
 			}
-			case "fill": {
+			case "fill":
+			{
 				await data_init(
 					lib_plankton.json.decode(
 						await lib_plankton.file.read(args.data_path)
@@ -421,16 +427,23 @@ async function main(
 				process.stdout.write("-- done\n");
 				break;
 			}
-			case "serve": {
+			case "serve":
+			{
 				// prepare database
 				await _zeitbild.database.check();
 				
+				/**
+				 * @todo clear old sessions
+				 */
+				
 				await lib_plankton.session.setup(
 					{
 						"data_chest": (
 							_zeitbild.conf.get().session_management.in_memory
-							? lib_plankton.storage.memory.implementation_chest<lib_plankton.session.type_session>({})
-							: lib_plankton.call.convey(
+							?
+							lib_plankton.storage.memory.implementation_chest<lib_plankton.session.type_session>({})
+							:
+							lib_plankton.call.convey(
 								lib_plankton.storage.sql_table_common.chest(
 									{
 										"database_implementation": _zeitbild.database.get_implementation(),
@@ -452,6 +465,7 @@ async function main(
 							)
 						),
 						"default_lifetime": _zeitbild.conf.get().session_management.lifetime,
+						"default_prolongation": _zeitbild.conf.get().session_management.prolongation,
 					}
 				);