diff --git a/pgbotlib/cron.py b/pgbotlib/cron.py
index f731731..1959293 100644
--- a/pgbotlib/cron.py
+++ b/pgbotlib/cron.py
@@ -1,4 +1,4 @@
-import time
+import asyncio
 import random
 
 import yaml
@@ -21,7 +21,8 @@ class Cron:
         tokens = frozenset(job['tokens'].split(','))
         async def send_message() -> None:
             if 'rand' in job:
-                time.sleep(random.randint(0, job['rand']) * 60)
+                wait_seconds = random.randint(0, job['rand']) * 60
+                await asyncio.sleep(wait_seconds)
             message = self.responder.get_response(tokens)
             message = self.responder.api_match(message, '')
             await self.client.send_message(job['chat'], message)