diff --git a/Pipfile.lock b/Pipfile.lock
index e024747f..b56b10ba 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -837,6 +837,7 @@
                 "sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369",
                 "sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d"
             ],
+            "index": "pypi",
             "markers": "python_version >= '3.7'",
             "version": "==3.1.4"
         },