diff --git a/requirements_dev.txt b/requirements_dev.txt
index 088eb4f..874f6da 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -6,7 +6,7 @@ flake8==3.5.0
 Sphinx==1.7.2
 coverage==4.5.1
 PyYAML==3.12
-pytest==3.5.0
+pytest==4.4.0
 pytest-cov==2.5.1
 pytest-runner==4.2
 sphinx_rtd_theme==0.2.5b2