diff --git a/hbd/server/hbdclass.py b/hbd/server/hbdclass.py
index 7f7ea53..b5e190b 100644
--- a/hbd/server/hbdclass.py
+++ b/hbd/server/hbdclass.py
@@ -304,6 +304,14 @@ class Host:
         self.managers: list = []            # usernames with manager role
         self.monitors: list = []            # usernames with monitor role
 
+    def __getstate__(self):
+        """Prepare Host for pickling by excluding non-serializable timer objects."""
+        state = self.__dict__.copy()
+        # asyncio TimerHandles (and their lambda callbacks) can't be pickled.
+        # They're recreated when the next PLG arrives after unpickling.
+        state['plugin_timers'] = {}
+        return state
+
     def statedict(self):
         d = {}
         d["raw_name"] = self.name