diff --git a/pkg/zxchainsdk/certificate.go b/pkg/zxchainsdk/certificate.go
index ae65639..e5de0b1 100644
--- a/pkg/zxchainsdk/certificate.go
+++ b/pkg/zxchainsdk/certificate.go
@@ -23,8 +23,8 @@ import (
 )
 
 const (
-	defaultCertificateBackgroundURL = "https://popiart-public-1313913486.cos.ap-guangzhou.myqcloud.com/media/2026/0513/84426.png"
-	defaultCertificateLogoURL       = "https://popiart-public-1313913486.cos.ap-guangzhou.myqcloud.com/media/2026/0513/84428.png"
+	defaultCertificateBackgroundURL = "https://popi-certificate-1386008232.cos.ap-guangzhou.myqcloud.com/65654.png"
+	defaultCertificateLogoURL       = "https://popi-certificate-1386008232.cos.ap-guangzhou.myqcloud.com/84428.png"
 	defaultCertificateBucketBaseURL = "https://popi-certificate-1386008232.cos.ap-guangzhou.myqcloud.com"
 )