diff --git a/requirements_dev.txt b/requirements_dev.txt
index d3d575c..0bbc3e5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.8.3
 flake8==3.5.0
 tox==3.0.0
 Sphinx==1.7.5
-coverage==4.5.1
+coverage==4.5.3
 cryptography==2.2.2
 PyYAML==3.12
 pytest==3.6.0