diff --git a/requirements-dev.txt b/requirements-dev.txt
index b06b676..143fe97 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 flake8==3.8.2
 async-timeout==3.0.1
 pytest==5.4.2
-pytest-cov==2.8.1
+pytest-cov==2.9.0
 pytest-mock==3.1.0
 coverage==5.1
 sphinx==3.0.3