diff --git a/requirements_dev.txt b/requirements_dev.txt
index 488ace8..26bbdfc 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.33.4
 watchdog==0.9.0
 flake8==3.6.0
 tox==3.12.1
-coverage==4.5.2
+coverage==4.5.3
 Sphinx==2.0.1
 sphinx-autodoc-typehints==1.6.0
 sphinx_rtd_theme==0.4.2