diff --git a/account/account.go b/account/account.go
index f8dad08..5dd52bb 100644
--- a/account/account.go
+++ b/account/account.go
@@ -2,6 +2,7 @@ package account
 
 import (
 	"crypto/ed25519"
+	"encoding/hex"
 	"errors"
 	"time"
 
@@ -280,9 +281,10 @@ func (s AccountServiceDefault) DeletePinByHash(hash string, userId uint) error {
 
 	return nil
 }
-func (s AccountServiceDefault) PinByHash(hash string, userId uint) error {
+func (s AccountServiceDefault) PinByHash(hash []byte, userId uint) error {
+	hashStr := hex.EncodeToString(hash)
 	// Define a struct for the query condition
-	uploadQuery := models.Upload{Hash: hash}
+	uploadQuery := models.Upload{Hash: hashStr}
 
 	// Retrieve the upload ID for the given hash
 	var uploadID uint