diff --git a/requirements_dev.txt b/requirements_dev.txt
index ea164a7f..486c731d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -9,6 +9,6 @@ Sphinx==1.7.7
 cryptography==2.3.1
 pytest==4.5.0
 pytest-runner==3.0
-pytest_cov
+pytest_cov==5.0.0
 twine==1.9.1
 magicmock==0.3