diff --git a/requirements_dev.txt b/requirements_dev.txt
index adfe06e..7192aa1 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -9,7 +9,7 @@ Sphinx==1.7.2
 cryptography==2.2.2
 PyYAML==3.12
 pytest==3.5.0
-pytest-runner==4.0
+pytest-runner==4.2
 docutils==0.14
 numpy==1.14.2
 more_itertools==4.1.0
\ No newline at end of file