diff --git a/src/PKPass.ts b/src/PKPass.ts
index b83799f..99df1fc 100644
--- a/src/PKPass.ts
+++ b/src/PKPass.ts
@@ -86,12 +86,12 @@ export class PKPass extends Bundle {
 			);
 		}
 
-		const bundle = Bundle.autoFreezable("application/vnd.apple.pkpasses");
-
 		const buffers = await Promise.all(
 			passes.map((pass) => pass.getAsBuffer()),
 		);
 
+		const bundle = Bundle.autoFreezable("application/vnd.apple.pkpasses");
+
 		for (let i = 0; i < buffers.length; i++) {
 			bundle.addBuffer(`packed-pass-${i + 1}.pkpass`, buffers[i]);
 		}