diff --git a/src/pages/sign/index.tsx b/src/pages/sign/index.tsx
index a3b2d2d..fe9d047 100644
--- a/src/pages/sign/index.tsx
+++ b/src/pages/sign/index.tsx
@@ -652,7 +652,7 @@ export const SignPage = () => {
       return
     }
 
-    let metaUrl: string | undefined
+    let metaUrl: string
     try {
       metaUrl = await uploadMetaToFileStorage(meta, encryptionKey)
     } catch (error) {