diff --git a/requirements_dev.txt b/requirements_dev.txt
index e834190..a07392c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.29.0
 watchdog==0.8.3
 flake8==3.0.4
 tox==2.3.1
-coverage==4.1
+coverage==4.2
 Sphinx==1.4.5
 
 pytest==2.9.2