diff --git a/jwt.go b/jwt.go
index 72002c5..89eafb6 100644
--- a/jwt.go
+++ b/jwt.go
@@ -15,6 +15,8 @@ import (
 const (
 	AccessType  = "access"
 	RefreshType = "refresh"
+
+	TFAStep = "tfa"
 )
 
 func CreateRefreshTokenByAccess(accessClaims JWT, ttl time.Duration) JWT {
@@ -75,8 +77,8 @@ func (j *JWT) WithAuthorizationInfo(tai TokenAuthorizationInfo, secret string) *
 	return j
 }
 
-func (j *JWT) WithTFAStep(tai TokenAuthorizationInfo, secret string) *JWT {
-	j.Step = "tfa"
+func (j *JWT) WithTFAStep() *JWT {
+	j.Step = TFAStep
 	return j
 }
 
@@ -94,7 +96,7 @@ func (j *JWT) IsRefreshToken() bool {
 }
 
 func (j *JWT) IsTFAStep() bool {
-	return j.Step == "tfa"
+	return j.Step == TFAStep
 }
 
 func (j *JWT) CheckAccess() bool {