diff --git a/requirements_dev.txt b/requirements_dev.txt
index c32ecd3..d967bc5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,5 +5,5 @@ pytest==4.4.0
 pytest-cov==2.6.1
 pytest-mpl==0.10
 coveralls==1.7.0
-setuptools==40.8.0
+setuptools==40.9.0
 bump2version==0.5.10