diff --git a/Pipfile b/Pipfile
index 34233f7..301aa09 100644
--- a/Pipfile
+++ b/Pipfile
@@ -30,4 +30,5 @@ factory-boy = "*"
 Faker = "*"
 
 [requires]
-python_version = "3.7"
+python_version = "3.9"
+python3.9 -m pipenv lock
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