diff --git a/requirements.txt b/requirements.txt
index 0dcbc92..c7ae621 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 mock==2.0.0; python_version < '3.0'
 pyobjc-core==4.1; sys_platform == 'darwin'
 pytest==3.5.0
-pytest-cov==2.5.1
+pytest-cov==4.0.0
 unittest2==1.1.0; python_version < '3.0'