diff --git a/matchy/state.py b/matchy/state.py
index 5af6096..0dbed7a 100644
--- a/matchy/state.py
+++ b/matchy/state.py
@@ -1,6 +1,6 @@
 """Store bot state"""
 import os
-from datetime import datetime
+from datetime import datetime, timedelta
 from schema import Schema, Use, Optional
 from collections.abc import Generator
 from typing import Protocol
@@ -243,18 +243,20 @@ class _State():
 
     def get_history_timestamps(self, users: list[Member]) -> list[datetime]:
         """Grab all timestamps in the history"""
-        others = [m.id for m in users]
+        ids = [int(m.id) for m in users]
 
         # Fetch all the interaction times in history
         # But only for interactions in the given user group
         times = set()
-        for data in (data for id, data in self._users.items() if int(id) in others):
+        for data in (data for id, data in self._users.items() if id in ids):
             matches = data.get(_Key.MATCHES, {})
-            for ts in (ts for id, ts in matches.items() if int(id) in others):
+            for ts in (ts for id, ts in matches.items() if id in ids):
                 times.add(ts)
 
         # Convert to datetimes and sort
         datetimes = [ts_to_datetime(ts) for ts in times]
+        # Remove any entries older than 6 months ago
+        datetimes = [t for t in datetimes if t >= datetime.now() - timedelta(months=3)]
         datetimes.sort()
         return datetimes