diff --git a/cli/internal/cmd/verify.go b/cli/internal/cmd/verify.go
index 68f787641e1..b422d641dcf 100644
--- a/cli/internal/cmd/verify.go
+++ b/cli/internal/cmd/verify.go
@@ -809,7 +809,7 @@ func newSNPReport(reportBytes []byte) (res verify.SNPReport, err error) {
 		SignerInfo: verify.SignerInfo{
 			AuthorKey:   signerInfo.AuthorKeyEn,
 			MaskChipKey: signerInfo.MaskChipKey,
-			SigningKey:  signerInfo.SigningKey,
+			SigningKey:  signerInfo.SigningKey.String(),
 		},
 		ReportData:      report.ReportData,
 		Measurement:     report.Measurement,
diff --git a/internal/verify/verify.go b/internal/verify/verify.go
index 086c4c7ebe2..fa24666555f 100644
--- a/internal/verify/verify.go
+++ b/internal/verify/verify.go
@@ -14,7 +14,6 @@ package verify
 
 import (
 	"crypto/x509"
-	"fmt"
 
 	"github.com/golang-jwt/jwt/v5"
 )
@@ -57,9 +56,9 @@ type PlatformInfo struct {
 
 // SignerInfo contains the signer information.
 type SignerInfo struct {
-	AuthorKey   bool         `json:"author_key_en"`
-	MaskChipKey bool         `json:"mask_chip_key"`
-	SigningKey  fmt.Stringer `json:"signing_key"`
+	AuthorKey   bool   `json:"author_key_en"`
+	MaskChipKey bool   `json:"mask_chip_key"`
+	SigningKey  string `json:"signing_key"`
 }
 
 // SNPReport contains the SNP report data.