diff --git a/app/main.go b/app/main.go
index df459943..3b86d3d9 100644
--- a/app/main.go
+++ b/app/main.go
@@ -106,7 +106,7 @@ func main() {
 		RemarkURL: strings.TrimSuffix(opts.RemarkURL, "/"),
 	}
 
-	jwtService := auth.NewJWT(opts.SecretKey, strings.HasPrefix(opts.RemarkURL, "https://"), time.Duration(7*24*time.Hour))
+	jwtService := auth.NewJWT(opts.SecretKey, strings.HasPrefix(opts.RemarkURL, "https://"), 7*24*time.Hour)
 
 	srv := api.Rest{
 		Version:     revision,
diff --git a/app/rest/auth/jwt.go b/app/rest/auth/jwt.go
index 73525435..dc5163d4 100644
--- a/app/rest/auth/jwt.go
+++ b/app/rest/auth/jwt.go
@@ -120,9 +120,8 @@ func (j *JWT) Refresh(w http.ResponseWriter, r *http.Request) (*CustomClaims, er
 	if err != nil {
 		return nil, err
 	}
-	untilExp := time.Unix(claims.ExpiresAt, 0).Sub(time.Now()).Seconds()
-	log.Print(untilExp)
-	if untilExp < j.exp.Seconds()/2 {
+	untilExp := claims.ExpiresAt - time.Now().Unix()
+	if untilExp <= int64(j.exp.Seconds()/2) {
 		claims.ExpiresAt = time.Now().Add(j.exp).Unix()
 		e := j.Set(w, claims)
 		return claims, e