diff --git a/jarvis_tasks/tasks/ban.py b/jarvis_tasks/tasks/ban.py
index 3e94ef5..9c9ca10 100644
--- a/jarvis_tasks/tasks/ban.py
+++ b/jarvis_tasks/tasks/ban.py
@@ -1,6 +1,6 @@
 """JARVIS ban tasks."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 
 from dis_snek import Snake
@@ -41,7 +41,7 @@ async def unban(bot: Snake, logger: Logger) -> None:
         logger: Global logger
     """
     while True:
-        max_ts = datetime.utcnow() + timedelta(minutes=9)
+        max_ts = datetime.now(tz=timezone.utc) + timedelta(minutes=9)
         bans = Ban.find(q(type="temp", active=True, duration__lte=max_ts))
         async for ban in bans:
             guild = await bot.fetch_guild(ban.guild)
diff --git a/jarvis_tasks/tasks/lock.py b/jarvis_tasks/tasks/lock.py
index c1fa087..0aad3ae 100644
--- a/jarvis_tasks/tasks/lock.py
+++ b/jarvis_tasks/tasks/lock.py
@@ -1,6 +1,6 @@
 """JARVIS Lock background task."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 
 from dis_snek import Snake
@@ -36,7 +36,7 @@ async def unlock(bot: Snake, logger: Logger) -> None:
         logger: Global logger
     """
     while True:
-        max_ts = datetime.utcnow() + timedelta(seconds=55)
+        max_ts = datetime.now(tz=timezone.utc) + timedelta(seconds=55)
         locks = Lock.find(q(active=True, created_at__lte=max_ts))
         async for lock in locks:
             guild = await bot.fetch_guild(lock.guild)
diff --git a/jarvis_tasks/tasks/lockdown.py b/jarvis_tasks/tasks/lockdown.py
index 36e66b1..2e2087b 100644
--- a/jarvis_tasks/tasks/lockdown.py
+++ b/jarvis_tasks/tasks/lockdown.py
@@ -1,6 +1,6 @@
 """JARVIS Lockdown background task."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 
 from dis_snek import Snake
@@ -29,7 +29,7 @@ async def lift(bot: Snake, logger: Logger) -> None:
         logger: Global logger
     """
     while True:
-        max_ts = datetime.utcnow() + timedelta(seconds=55)
+        max_ts = datetime.now(tz=timezone.utc) + timedelta(seconds=55)
         locks = Lockdown.find(q(active=True, created_at__lte=max_ts))
         async for lock in locks:
             guild = await bot.fetch_guild(lock.guild)
diff --git a/jarvis_tasks/tasks/reminder.py b/jarvis_tasks/tasks/reminder.py
index 9357a6d..8196793 100644
--- a/jarvis_tasks/tasks/reminder.py
+++ b/jarvis_tasks/tasks/reminder.py
@@ -1,6 +1,6 @@
 """JARVIS reminders."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 from typing import Optional
 
@@ -63,7 +63,7 @@ async def remind(bot: Snake, logger: Logger) -> None:
         logger: Global logger
     """
     while True:
-        max_ts = datetime.utcnow() + timedelta(seconds=5)
+        max_ts = datetime.now(tz=timezone.utc) + timedelta(seconds=5)
         reminders = Reminder.find(q(remind_at__lte=max_ts, active=True))
         async for reminder in reminders:
             user = await bot.fetch_user(reminder.user)
diff --git a/jarvis_tasks/tasks/twitter.py b/jarvis_tasks/tasks/twitter.py
index 192fba0..464a240 100644
--- a/jarvis_tasks/tasks/twitter.py
+++ b/jarvis_tasks/tasks/twitter.py
@@ -1,6 +1,6 @@
 """JARVIS Twitter sync."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 from typing import List
 
@@ -90,11 +90,11 @@ async def twitter(bot: Snake, logger: Logger) -> None:
         async for account in accounts:
             logger.debug(f"Checking account {account.handle}")
             # Check if account needs updated (handle changes)
-            if account.last_sync + timedelta(hours=1) <= datetime.utcnow():
+            if account.last_sync + timedelta(hours=1) <= datetime.now(tz=timezone.utc):
                 logger.debug(f"Account {account.handle} out of sync, updating")
                 user = api.get_user(user_id=account.twitter_id)
                 account.handle = user.screen_name
-                account.last_sync = datetime.utcnow()
+                account.last_sync = datetime.now(tz=timezone.utc)
                 await account.commit()
 
             # Get new tweets
diff --git a/jarvis_tasks/tasks/warning.py b/jarvis_tasks/tasks/warning.py
index 3815bd8..c895635 100644
--- a/jarvis_tasks/tasks/warning.py
+++ b/jarvis_tasks/tasks/warning.py
@@ -1,6 +1,6 @@
 """JARVIS warnings tasks."""
 import asyncio
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from logging import Logger
 
 from dis_snek import Snake
@@ -25,7 +25,7 @@ async def unwarn(bot: Snake, logger: Logger) -> None:
         logger: Global logger
     """
     while True:
-        max_ts = datetime.utcnow() + timedelta(minutes=55)
+        max_ts = datetime.now(tz=timezone.utc) + timedelta(minutes=55)
         warns = Warning.find(q(active=True, created_at__lte=max_ts))
         async for warn in warns:
             coro = _unwarn(warn, logger)
diff --git a/jarvis_tasks/util.py b/jarvis_tasks/util.py
index 5910065..82f49e5 100644
--- a/jarvis_tasks/util.py
+++ b/jarvis_tasks/util.py
@@ -1,6 +1,6 @@
 """JARVIS task utilities."""
 import asyncio
-from datetime import datetime
+from datetime import datetime, timezone
 from logging import Logger
 from typing import Coroutine
 
@@ -15,6 +15,6 @@ async def runat(when: datetime, coro: Coroutine, logger: Logger) -> None:
         logger: Global logger
     """
     logger.debug(f"Scheduling task {coro.__name__} for {when.isoformat()}")
-    delay = when - datetime.utcnow()
+    delay = when - datetime.now(tz=timezone.utc)
     await asyncio.sleep(delay.total_seconds())
     await coro