diff --git a/requirements_dev.txt b/requirements_dev.txt
index 3e622af..35cc4f8 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ wheel==0.31.1
 watchdog==0.8.3
 pylint==1.9.2
 pytest==3.6.1
-pytest-cov==2.5.1
+pytest-cov==2.12.0
 pytest-mock==1.10.0
 tox==3.0.0
 Sphinx==1.7.5