diff --git a/barker/barker/routers/voucher/show.py b/barker/barker/routers/voucher/show.py
index c0cf102..854fe1a 100644
--- a/barker/barker/routers/voucher/show.py
+++ b/barker/barker/routers/voucher/show.py
@@ -40,10 +40,10 @@ def from_bill(
 ):
     with SessionFuture() as db:
         query = select(Voucher)
-        if re.compile(r"^\d{2,}-\d{4}$").match(id_):
-            query = query.where(
-                Voucher.bill_id == int(id_.replace("-", "")), Voucher.voucher_type == VoucherType.REGULAR_BILL
-            )
+        if re.compile(r"^\d{1,3}-\d{1,4}$").match(id_):
+            s, n = id_.split("-")
+            i = int(s * 10000) + int(n)
+            query = query.where(Voucher.bill_id == i, Voucher.voucher_type == VoucherType.REGULAR_BILL)
         elif re.compile(r"^K-\d+$").match(id_):
             query = query.where(
                 Voucher.kot_id == int(id_.replace("K-", "")),
diff --git a/bookie/src/app/settings/settings.service.ts b/bookie/src/app/settings/settings.service.ts
index 1432507..4ab31ca 100644
--- a/bookie/src/app/settings/settings.service.ts
+++ b/bookie/src/app/settings/settings.service.ts
@@ -21,11 +21,9 @@ export class SettingsService {
 
   setPrefillCustomerDiscount(value: boolean): Observable<boolean> {
     const url = '/api/settings/prefill-customer-discount';
-    return this.http
-      .post<{ value: boolean }>(url, { value: value })
-      .pipe(
-        map((x) => x.value),
-        catchError(this.log.handleError(serviceName, 'setPrefillCustomerDiscount')),
-      ) as Observable<boolean>;
+    return this.http.post<{ value: boolean }>(url, { value: value }).pipe(
+      map((x) => x.value),
+      catchError(this.log.handleError(serviceName, 'setPrefillCustomerDiscount')),
+    ) as Observable<boolean>;
   }
 }
diff --git a/lint.sh b/lint.sh
index c572fb3..ca784c3 100755
--- a/lint.sh
+++ b/lint.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" || exit ; pwd -P )
 cd "$parent_path/bookie" || exit
-npx prettier --write src/
+npx prettier --write src/app
 npx ng lint --fix
 cd "$parent_path/barker" || exit
 isort barker