diff --git a/requirements_dev.txt b/requirements_dev.txt
index cd0c8ea..2d4a673 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,4 +10,4 @@ twine==1.13.0
 
 pytest==4.5.0
 pytest-runner==4.4
-pytest-cov==2.7.1
+pytest-cov==2.9.0