diff --git a/dev-requirements.txt b/dev-requirements.txt
index 7c7ff64..b2b496b 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -17,7 +17,7 @@ isort==5.7.0
 mccabe==0.6.1
 mypy-extensions==0.4.3
 packaging==21.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-pathspec==0.8.1
+pathspec==0.9.0
 pluggy==0.13.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 py==1.10.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 pycodestyle==2.6.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'