diff --git a/run.py b/run.py
index 840f501..3ae958e 100755
--- a/run.py
+++ b/run.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # coding: utf-8
 
-from datetime import datetime
+from datetime import datetime, timezone
 from distutils import spawn
 import argparse
 import json
@@ -219,8 +219,8 @@ def install_dependencies():
 def check_for_update():
   if os.path.exists(FILE_UPDATE):
     mtime = os.path.getmtime(FILE_UPDATE)
-    last = datetime.utcfromtimestamp(mtime).strftime('%Y-%m-%d')
-    today = datetime.utcnow().strftime('%Y-%m-%d')
+    last = datetime.fromtimestamp(mtime, tz=timezone.utc).strftime('%Y-%m-%d')
+    today = datetime.now(timezone.utc).strftime('%Y-%m-%d')
     if last == today:
       return
   try: