diff --git a/libretranslate/remove_translated_files.py b/libretranslate/remove_translated_files.py
index c354b1a..2936557 100644
--- a/libretranslate/remove_translated_files.py
+++ b/libretranslate/remove_translated_files.py
@@ -18,7 +18,7 @@ def remove_translated_files(upload_dir: str):
 
 
 def setup(upload_dir):
-    scheduler = BackgroundScheduler(daemon=True)
+    scheduler = BackgroundScheduler(daemon=True, timezone='UTC')
     scheduler.add_job(remove_translated_files, "interval", minutes=30, kwargs={'upload_dir': upload_dir})
     scheduler.start()
 
diff --git a/libretranslate/scheduler.py b/libretranslate/scheduler.py
index 836a3ea..3dd551e 100644
--- a/libretranslate/scheduler.py
+++ b/libretranslate/scheduler.py
@@ -11,7 +11,7 @@ def setup(args):
     global scheduler
 
     if scheduler is None:
-        scheduler = BackgroundScheduler()
+        scheduler = BackgroundScheduler(timezone='UTC')
 
         if not args.secondary and args.req_flood_threshold > 0:
             scheduler.add_job(func=forgive_banned, trigger="interval", minutes=10)