diff --git a/dev-requirements.txt b/dev-requirements.txt
index abc3af61..9023c5de 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -5,6 +5,6 @@ pytest-cov>=2.6.1
 setuptools>=40.8.0
 vulture>=1.0
 bandit>=1.5.1
-pydocstyle>=3.0.0
+pydocstyle>=6.3.0
 matplotlib>=3.0.0
 seaborn>=0.9.1