diff --git a/src/lib/invoice-pdf.ts b/src/lib/invoice-pdf.ts
index d95fea4..c81caa6 100644
--- a/src/lib/invoice-pdf.ts
+++ b/src/lib/invoice-pdf.ts
@@ -56,6 +56,7 @@ export interface InvoicePdfInput {
     status: string;
     notes?: string | null;
     matter?: string | null;
+    caseNumber?: string | null;
     terms?: string | null;
   };
   groups: InvoiceCaseGroup[];