diff --git a/requirements/rtd.txt b/requirements/rtd.txt
index cf39d6da..f0ab53e6 100644
--- a/requirements/rtd.txt
+++ b/requirements/rtd.txt
@@ -16,7 +16,7 @@ dnspython3==1.12.0
 py3dns==3.1.0
 mock==2.0.0
 pytest==2.9.1
-pytest-cov==2.2.1
+pytest-cov==4.1.0
 python-coveralls==2.7.0
 pep8==1.7.1
 git+https://github.com/SpamExperts/MINI-DNS-Server.git
diff --git a/requirements/tests.txt b/requirements/tests.txt
index d7a947b4..9c8e8b45 100644
--- a/requirements/tests.txt
+++ b/requirements/tests.txt
@@ -1,7 +1,7 @@
 # Requirements for running tests.
 mock==2.0.0
 pytest==2.9.1
-pytest-cov==2.2.1
+pytest-cov==4.1.0
 python-coveralls==2.7.0
 pep8==1.7.1
 se_profile==1.0.0