diff --git a/packages/frontend/src/crm/lexware/LexwareSyncPage.tsx b/packages/frontend/src/crm/lexware/LexwareSyncPage.tsx
index 6469292..1ff5252 100644
--- a/packages/frontend/src/crm/lexware/LexwareSyncPage.tsx
+++ b/packages/frontend/src/crm/lexware/LexwareSyncPage.tsx
@@ -75,8 +75,9 @@ function ImportTab() {
   const createContact = useCreateContact();
 
   // Load CRM entities to detect already-imported Lexware contacts
-  const companiesQuery = useCompanies({ page: 1, pageSize: 500, sort: 'name', order: 'asc' });
-  const contactsQuery = useContacts({ page: 1, pageSize: 500, sort: 'lastName', order: 'asc' });
+  // pageSize max 100 (backend DTO validation @Max(100))
+  const companiesQuery = useCompanies({ page: 1, pageSize: 100, sort: 'name', order: 'asc' });
+  const contactsQuery = useContacts({ page: 1, pageSize: 100, sort: 'lastName', order: 'asc' });
 
   // Build lookup: lexwareContactId → { type, name, id }
   const linkedMap = new Map<string, { type: 'company' | 'contact'; name: string; id: string }>();