diff --git a/matrix_pygmalion_bot/bot/core.py b/matrix_pygmalion_bot/bot/core.py
index fc48f45..48d2e5d 100644
--- a/matrix_pygmalion_bot/bot/core.py
+++ b/matrix_pygmalion_bot/bot/core.py
@@ -277,11 +277,12 @@ class ChatBot(object):
                 for room_id in self.rooms.keys():
                     self.rooms[room_id]["tick"] += 1
                 if datetime.now().hour >= 1 and datetime.now().hour < 5:
-                    load1, load5, load15 = [x / psutil.cpu_count() * 100 for x in psutil.getloadavg()]
-                    if load5 < 25 and load1 < 25:
-                        if not hasattr(self, "last_sleep") or self.last_sleep + timedelta(hours=6) < datetime.now():
-                            await self.ai.sleep()
-                            self.last_sleep = datetime.now()
+                    if not hasattr(self, "last_conversation") or self.last_conversation + timedelta(minutes=30) < datetime.now():
+                        load1, load5, load15 = [x / psutil.cpu_count() * 100 for x in psutil.getloadavg()]
+                        if load5 < 25 and load1 < 25:
+                            if not hasattr(self, "last_sleep") or self.last_sleep + timedelta(hours=6) < datetime.now():
+                                await self.ai.sleep()
+                                self.last_sleep = datetime.now()
 
 
         finally: