diff --git a/dev-requirements.txt b/dev-requirements.txt
index 6801ed2..7900e3f 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,7 +2,7 @@ pytest
 pytest-cov
 mypy
 flake8==3.7.9
-pep8-naming==0.8.2
+pep8-naming==0.9.1
 flake8-quotes==2.1.1
 flake8-import-order==0.18.1
 Sphinx