1 files changed, 1 insertions, 1 deletions

diff --git a/echo/middleware/csrf.go b/echo/middleware/csrf.go
index f709964..4143fa1 100644
--- a/echo/middleware/csrf.go
+++ b/echo/middleware/csrf.go
@@ -218,7 +218,7 @@ func CSRFProtectWithConfig[T CSRFAwareSession](cfg CSRFConfig[T]) echo.Middlewar
                                 return ErrCSRFTokenInvalid
                         }
 
-                        c.Response().Header().Add("Vary", "Cookie")
+                        c.Response().Header().Add(echo.HeaderVary, "Cookie")
 
                         return next(c)
                 }