diff --git a/Pipfile.lock b/Pipfile.lock
index 12838e2..7b36f4d 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -302,7 +302,7 @@
                 "sha256:7a7c7003b000adf9e7ca2a377c9688bbc54ed41b985789ed576570342a375cd2",
                 "sha256:b19e1a85d206b56d7df1d5e683df4a7725252a964e3993648dd0fb5a1c157564"
             ],
-            "markers": "python_version >= '3.7'",
+            "markers": "python_version >= '3.6'",
             "version": "==2.0.6"
         }
     },