diff --git a/sync/src/scraper.ts b/sync/src/scraper.ts
index 3330ccf..d0889d8 100644
--- a/sync/src/scraper.ts
+++ b/sync/src/scraper.ts
@@ -252,7 +252,7 @@ async function scrapeMembers(frame: Frame): Promise<FdiskMember[]> {
       const endNr = startNr + BATCH - 1;
 
       // Set StNr range in the search form and submit
-      const formOk = await frame.evaluate((s: number, e: number) => {
+      const formOk = await frame.evaluate(({ s, e }: { s: number; e: number }) => {
         const form = (document as any).forms['frmsearch'];
         if (!form) return false;
         const fromFld = form.elements['ListFilter$searchstandesbuchnummer'] as HTMLInputElement;
@@ -261,7 +261,7 @@ async function scrapeMembers(frame: Frame): Promise<FdiskMember[]> {
         fromFld.value = String(s);
         toFld.value   = String(e);
         return true;
-      }, startNr, endNr);
+      }, { s: startNr, e: endNr });
 
       if (!formOk) {
         log('WARN: could not set StNr range fields — aborting range queries');