diff --git a/auth_simple.go b/auth_simple.go
index 1f497ef..297c67c 100644
--- a/auth_simple.go
+++ b/auth_simple.go
@@ -82,6 +82,11 @@ func (a authSimple) DetectUser(res http.ResponseWriter, r *http.Request) (string
 		if !ok {
 			return "", nil, errNoValidUserFound
 		}
+
+		// We had a cookie, lets renew it
+		if err := sess.Save(r, res); err != nil {
+			return "", nil, err
+		}
 	}
 
 	groups := []string{}
diff --git a/auth_yubikey.go b/auth_yubikey.go
index 2e0057e..5ae613b 100644
--- a/auth_yubikey.go
+++ b/auth_yubikey.go
@@ -66,6 +66,11 @@ func (a authYubikey) DetectUser(res http.ResponseWriter, r *http.Request) (strin
 		return "", nil, errNoValidUserFound
 	}
 
+	// We had a cookie, lets renew it
+	if err := sess.Save(r, res); err != nil {
+		return "", nil, err
+	}
+
 	groups := []string{}
 	for group, users := range a.Groups {
 		if str.StringInSlice(user, users) {