diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 61ecca3..d7a6ad3 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -66,7 +66,7 @@ fn gen_rsa_pair(merchant_id: &str, email: &str, save_path: &str) -> Result<(), E
     x509_builder.set_issuer_name(&x509_name)?;
     x509_builder.set_pubkey(&private_key)?;
     let not_before = Asn1Time::days_from_now(0)?;
-    let not_after = Asn1Time::days_from_now(1095)?;
+    let not_after = Asn1Time::days_from_now(3650)?;
     x509_builder.set_not_before(&not_before)?;
     x509_builder.set_not_after(&not_after)?;
     x509_builder.sign(&private_key, MessageDigest::sha256())?;