diff --git a/pipenv/utils/indexes.py b/pipenv/utils/indexes.py
index 4d5a0236..602b992e 100644
--- a/pipenv/utils/indexes.py
+++ b/pipenv/utils/indexes.py
@@ -1,10 +1,10 @@
 import re
+from collections.abc import Mapping
 
 from urllib3.util import parse_url
 
 from pipenv import environments
 from pipenv.exceptions import PipenvUsageError
-from pipenv.vendor.vistir.compat import Mapping
 
 from .internet import create_mirror_source, is_pypi_url