diff --git a/Pipfile b/Pipfile
index 23b1370..3fbc6e4 100644
--- a/Pipfile
+++ b/Pipfile
@@ -14,6 +14,7 @@ pyyaml = "~=5.4.1"
 
 [dev-packages]
 flake8 = "~=3.9.2"
+yapf = "~=0.31.0"
 
 [requires]
 python_version = "3.8"