diff --git a/requirements_dev.txt b/requirements_dev.txt
index f03b5e9..594126f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,4 +8,4 @@ Sphinx==1.7.2
 PyYAML==3.12
 pytest==3.5.0
 pytest-cov==2.5.1
-pytest-runner==4.2
+pytest-runner==5.1