diff --git a/requirements_dev.txt b/requirements_dev.txt
index 088eb4f..a6cb497 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,6 +7,6 @@ Sphinx==1.7.2
 coverage==4.5.1
 PyYAML==3.12
 pytest==3.5.0
-pytest-cov==2.5.1
+pytest-cov==2.6.1
 pytest-runner==4.2
 sphinx_rtd_theme==0.2.5b2