diff --git a/Pipfile.lock b/Pipfile.lock
index 92d0cbe..e706267 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -38,6 +38,7 @@
                 "sha256:714d0a4932c059d16189f58ef5411ec2287a4360f17cdd0edd2d09d4c5087c93",
                 "sha256:c204494cd97479d0e39f28c93d46c0b2d5959c7b9ab904762ea6c7af211c8663"
             ],
+            "index": "pypi",
             "markers": "python_version >= '3.8'",
             "version": "==0.5.0"
         },