diff --git a/asyncpool/__init__.py b/asyncpool/__init__.py
index 8898b4a..2c6dbd4 100644
--- a/asyncpool/__init__.py
+++ b/asyncpool/__init__.py
@@ -2,8 +2,7 @@
 from datetime import datetime, timezone
 
 def utc_now():
-    # utcnow returns a naive datetime, so we have to set the timezone manually <sigh>
-    return datetime.utcnow().replace(tzinfo=timezone.utc)
+    return datetime.now(tz=timezone.utc)
 
 class Terminator:
     pass
@@ -151,4 +150,4 @@ async def join(self):
             self._logger.debug('Completed {}'.format(self._name))
 
         if self._exceptions and self._raise_on_join:
-            raise Exception("Exception occurred in pool {}".format(self._name))
\ No newline at end of file
+            raise Exception("Exception occurred in pool {}".format(self._name))