diff --git a/requirements_dev.txt b/requirements_dev.txt
index 823b6fd..2e9dd6f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.33.4
 watchdog==0.9.0
 flake8==3.7.8
 tox==3.13.2
-coverage==4.5.3
+coverage==4.5.4
 Sphinx==2.1.2
 cryptography==2.7
 PyYAML==5.1.1