diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2837b29..32c82fb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ bumpversion==0.5.3
 wheel==0.30.0
 watchdog==0.8.3
 Sphinx==1.6.7
-coverage==4.5
+coverage==4.5.1
 sphinxcontrib-napoleon==0.6.1
 tox==2.9.1
 pytest==3.4.0