diff --git a/requirements_dev.txt b/requirements_dev.txt
index c195455..5c778be 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.31.0
 tox==2.9.1
 flake8==3.5.0
 Sphinx==1.7.2
-coverage==4.5.1
+coverage==4.5.4
 pyyaml>=4.2b1
 pytest==3.5.0
 pytest-cov==2.5.1