diff --git a/tests/test_monitor.py b/tests/test_monitor.py
index ef053a3..e84b4c2 100644
--- a/tests/test_monitor.py
+++ b/tests/test_monitor.py
@@ -147,6 +147,21 @@ class TestMonitor(UptimeKumaTestCase):
         }
         self.do_test_monitor_type(expected_monitor)
 
+    def test_edit_notification_id_list(self):
+        # https://github.com/lucasheld/uptime-kuma-api/issues/3
+
+        monitor_id = self.add_monitor()
+        notification_id = self.add_notification()
+
+        expected_monitor = self.api.get_monitor(monitor_id)
+        expected_monitor["notificationIDList"] = {str(notification_id): True}
+
+        r = self.api.edit_monitor(id_=monitor_id, notificationIDList=[notification_id])
+        self.assertEqual(r["msg"], "Saved.")
+
+        monitor = self.api.get_monitor(monitor_id)
+        self.compare(monitor, expected_monitor)
+
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/tests/uptime_kuma_test_case.py b/tests/uptime_kuma_test_case.py
index 967933b..8cbbc8e 100644
--- a/tests/uptime_kuma_test_case.py
+++ b/tests/uptime_kuma_test_case.py
@@ -11,8 +11,14 @@ def compare(subset, superset):
         value2 = superset.get(key)
         if type(value) == list:
             for i in range(len(value)):
-                if not value2 or not compare(value[i], value2[i]):
+                if not value2:
                     return False
+                elif type(value[i]) == list or type(value[i]) == dict:
+                    if not compare(value[i], value2[i]):
+                        return False
+                else:
+                    if value[i] != value2[i]:
+                        return False
         elif type(value) == dict:
             if not compare(value, value2):
                 return False
@@ -72,3 +78,8 @@ class UptimeKumaTestCase(unittest.TestCase):
         r = self.api.add_tag(name="tag 1", color="#ffffff")
         tag_id = r["id"]
         return tag_id
+
+    def add_notification(self):
+        r = self.api.add_notification(name="notification 1", type="PushByTechulus", pushAPIKey="123456789")
+        notification_id = r["id"]
+        return notification_id
diff --git a/uptime_kuma_api/api.py b/uptime_kuma_api/api.py
index e4481e4..23e71e9 100644
--- a/uptime_kuma_api/api.py
+++ b/uptime_kuma_api/api.py
@@ -23,6 +23,18 @@ def int_to_bool(data, keys):
                 data[key] = True if data[key] == 1 else False
 
 
+def _convert_monitor_data(**kwargs):
+    if not kwargs["accepted_statuscodes"]:
+        kwargs["accepted_statuscodes"] = ["200-299"]
+
+    dict_notification_ids = {}
+    if kwargs["notificationIDList"]:
+        for notification_id in kwargs["notificationIDList"]:
+            dict_notification_ids[notification_id] = True
+    kwargs["notificationIDList"] = dict_notification_ids
+    return kwargs
+
+
 def _build_monitor_data(
         type: MonitorType,
         name: str,
@@ -78,15 +90,6 @@ def _build_monitor_data(
                                         "Connection Timeout=<int>",
         databaseQuery: str = None
 ):
-    if not accepted_statuscodes:
-        accepted_statuscodes = ["200-299"]
-
-    dict_notification_ids = {}
-    if notificationIDList:
-        for notification_id in notificationIDList:
-            dict_notification_ids[notification_id] = True
-    notificationIDList = dict_notification_ids
-
     data = {
         "type": type,
         "name": name,
@@ -525,6 +528,7 @@ class UptimeKumaApi(object):
 
     def add_monitor(self, **kwargs):
         data = _build_monitor_data(**kwargs)
+        data = _convert_monitor_data(**data)
         _check_arguments_monitor(data)
         r = self._call('add', data)
         return r
@@ -532,6 +536,7 @@ class UptimeKumaApi(object):
     def edit_monitor(self, id_: int, **kwargs):
         data = self.get_monitor(id_)
         data.update(kwargs)
+        data = _convert_monitor_data(**data)
         _check_arguments_monitor(data)
         r = self._call('editMonitor', data)
         return r