diff --git a/requirements_dev.txt b/requirements_dev.txt
index faeb3b1..fce2eb9 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ wheel==0.31.1
 watchdog==0.9.0
 flake8==3.7.7
 tox==3.4.0
-coverage==4.5.3
+coverage==5.1
 Sphinx==1.8.0
 pygments==2.2.0
 cryptography==2.4.1