diff --git a/stateless_uptime_kuma/uptime_kuma.py b/stateless_uptime_kuma/uptime_kuma.py
index 0fefc4b..bd3f181 100644
--- a/stateless_uptime_kuma/uptime_kuma.py
+++ b/stateless_uptime_kuma/uptime_kuma.py
@@ -113,7 +113,7 @@ class Monitor(Item):
                 (i["tag_id"], i["value"]) for i in self.api.get_monitor(self.id)["tags"]
             )
             for t, v in self.tags:
-                if (t, v) not in current_tags:
+                if (t.id, v) not in current_tags:
                     logger.debug(f"Adding tag: '{t}, {v}'")
                     self.api.add_monitor_tag(tag_id=t.id, monitor_id=self.id, value=v)
         self.saved = True