diff --git a/Pipfile.lock b/Pipfile.lock
index 7db5c583..a5c3a9c0 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -820,6 +820,7 @@
                 "sha256:37a0344459b199fce0e80b0d3569837ec6b6937435c5244e7fd73fa6006830f3",
                 "sha256:3e3d753a8618b86d7de333b4223005f68720bcd6a7d2bcb9fbd2229ec7c1e429"
             ],
+            "index": "pypi",
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
             "version": "==1.26.19"
         },