diff --git a/server/notification-providers/serwersms.js b/server/notification-providers/serwersms.js
index f7c8644af..0a08e7ffd 100644
--- a/server/notification-providers/serwersms.js
+++ b/server/notification-providers/serwersms.js
@@ -17,6 +17,8 @@ class SerwerSMS extends NotificationProvider {
                     "Content-Type": "application/json",
                 }
             };
+
+            // Użyj telefonu jako pierwszej opcji
             let data = {
                 "username": notification.serwersmsUsername,
                 "password": notification.serwersmsPassword,
@@ -27,6 +29,13 @@ class SerwerSMS extends NotificationProvider {
 
             let resp = await axios.post(url, data, config);
 
+            if (!resp.data.success) {
+                // If unsuccessful, try using group_id
+                data.phone = null; // Clear phone number
+                data.group_id = notification.serwersmsPhoneNumber;
+                resp = await axios.post(url, data, config);
+            }
+
             if (!resp.data.success) {
                 if (resp.data.error) {
                     let error = `SerwerSMS.pl API returned error code ${resp.data.error.code} (${resp.data.error.type}) with error message: ${resp.data.error.message}`;