diff --git a/models/repo.go b/models/repo.go
index f99e909ae..21dca5daa 100755
--- a/models/repo.go
+++ b/models/repo.go
@@ -1069,7 +1069,8 @@ func CreateRepository(ctx DBContext, doer, u *User, repo *Repository) (err error
 		return err
 	}
 
-	_, err = blockchain.NewRepo(string(repo.ID), u.PublicKey, repo.Name)
+	strRepoID := strconv.FormatInt(repo.ID, 10)
+	_, err = blockchain.NewRepo(strRepoID, u.PublicKey, repo.Name)
 	if err != nil {
 		log.Error("newRepo failed:", err.Error())
 	}