diff --git a/requirements_dev.txt b/requirements_dev.txt
index f6d4ce0..11685f0 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.34.1
 watchdog==0.10.0
 flake8==3.7.9
 tox==3.14.3
-coverage==5.0.3
+coverage==5.2.1
 Sphinx==2.3.1
 cryptography==2.8
 PyYAML==5.3