diff --git a/Pipfile b/Pipfile
index f8622fa..3e541a6 100644
--- a/Pipfile
+++ b/Pipfile
@@ -17,7 +17,7 @@ marshmallow = "*"
 pytest-cov = "*"
 
 [requires]
-python_version = "3.7"
+python_version = ">=3.6"
 
 [pipenv]
 allow_prereleases = true