diff --git a/router.go b/router.go
index 9479965..c93ca9b 100644
--- a/router.go
+++ b/router.go
@@ -60,6 +60,7 @@ func (router *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 
 			if user != nil {
 				user.Session = sess
+				http.SetCookie(w, &http.Cookie{Name: auth.SessionCookieName, Value: sess.ID, Expires: sess.Time.Add(auth.SessionMaxTime), Path: "/", HttpOnly: true})
 			}
 		}
 	}