diff --git a/requirements_dev.txt b/requirements_dev.txt
index 981164f..60bdfc9 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.29.0
 watchdog==0.8.3
 flake8==3.3.0
 tox==2.7.0
-coverage==4.3.4
+coverage==4.4
 Sphinx==1.5.5
 cryptography==1.8.1
 PyYAML==3.12