diff --git a/requirements-dev.txt b/requirements-dev.txt
index 4a4759b..c5c3fc4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,7 +6,7 @@ isort==4.3.21
 mock==3.0.5
 moto==1.3.6
 py==1.8.1
-pytest-cov==2.8.1
+pytest-cov==2.9.0
 pytest==3.8.2; python_version == '2.7'
 pytest==4.6.6; python_version == '3.4'
 pytest==5.2.1; python_version > '3.4'