diff --git a/pipenv/vendor/tomlkit/items.py b/pipenv/vendor/tomlkit/items.py
index 7035b69e..39128d30 100644
--- a/pipenv/vendor/tomlkit/items.py
+++ b/pipenv/vendor/tomlkit/items.py
@@ -6,7 +6,10 @@ import string
 from datetime import date
 from datetime import datetime
 from datetime import time
-from enum import Enum
+try:
+    from enum import Enum
+except ImportError:
+    from pipenv.vendor.backports.enum import Enum
 
 from ._compat import PY2
 from ._compat import decode