diff --git a/advotracker/src/data/structures.rs b/advotracker/src/data/structures.rs
index bc9977b..0a476ec 100644
--- a/advotracker/src/data/structures.rs
+++ b/advotracker/src/data/structures.rs
@@ -95,7 +95,7 @@ pub struct CsvExportRecord {
     /// Versicherungsschein Code
     pub policy_code: String,
     /// Versicherungsscheinnummer (10-stellig, numerisch)
-    pub policy_number: u32,
+    pub policy_number: usize,
     /// Anrufer: "Vorname, Nachname"
     pub policy_holder: String,
     /// Sachverhalt: "Kurzschilderung"