diff --git a/requirements_dev.txt b/requirements_dev.txt
index d25e266..e2c9d69 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.33.1
 watchdog==0.9.0
 flake8==3.7.7
 tox==3.8.3
-coverage==4.5.1
+coverage==4.5.3
 Sphinx==1.8.5
 cryptography==2.6.1
 PyYAML==3.12