diff --git a/watchtower-plugin/tower_info.py b/watchtower-plugin/tower_info.py
index ee4499c..8aa6b7a 100644
--- a/watchtower-plugin/tower_info.py
+++ b/watchtower-plugin/tower_info.py
@@ -1,5 +1,13 @@
 class TowerInfo:
-    def __init__(self, netaddr, available_slots, status="active", appointments=None, pending_appointments=None):
+    def __init__(
+        self,
+        netaddr,
+        available_slots,
+        status="reachable",
+        appointments=None,
+        pending_appointments=None,
+        invalid_appointments=None,
+    ):
         self.netaddr = netaddr
         self.available_slots = available_slots
         self.status = status
@@ -14,6 +22,11 @@ class TowerInfo:
         else:
             self.pending_appointments = pending_appointments
 
+        if not invalid_appointments:
+            self.invalid_appointments = []
+        else:
+            self.invalid_appointments = invalid_appointments
+
     @classmethod
     def from_dict(cls, tower_data):
         netaddr = tower_data.get("netaddr")
@@ -21,11 +34,15 @@ class TowerInfo:
         status = tower_data.get("status")
         appointments = tower_data.get("appointments")
         pending_appointments = tower_data.get("pending_appointments")
+        invalid_appointments = tower_data.get("invalid_appointments")
 
-        if any(v is None for v in [netaddr, available_slots, status, appointments, pending_appointments]):
+        if any(
+            v is None
+            for v in [netaddr, available_slots, status, appointments, pending_appointments, invalid_appointments]
+        ):
             raise ValueError("Wrong appointment data, some fields are missing")
 
-        return cls(netaddr, available_slots, status, appointments, pending_appointments)
+        return cls(netaddr, available_slots, status, appointments, pending_appointments, invalid_appointments)
 
     def to_dict(self):
         return self.__dict__
@@ -36,4 +53,5 @@ class TowerInfo:
             "status": self.status,
             "available_slots": self.available_slots,
             "pending_appointments": self.pending_appointments,
+            "invalid_appointments": self.invalid_appointments,
         }