diff --git a/dateutil/tz/tz.py b/dateutil/tz/tz.py
index 9d64c37a9..2460b5ed5 100644
--- a/dateutil/tz/tz.py
+++ b/dateutil/tz/tz.py
@@ -1823,7 +1823,7 @@ def _get_supported_offset(second_offset):
 
 try:
     # Python 3.7 feature
-    from contextmanager import nullcontext as _nullcontext
+    from contextlib import nullcontext as _nullcontext
 except ImportError:
     class _nullcontext(object):
         """