diff --git a/test-requirements.txt b/test-requirements.txt
index 8b3ac2b1..a016a01e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,7 +6,7 @@ hacking<0.12,>=0.11.0 # Apache-2.0
 flake8-docstrings==0.2.1.post1 # MIT
 
 bandit>=1.1.0 # Apache-2.0
-coverage>=3.6 # Apache-2.0
+coverage>=4.0 # Apache-2.0
 discover # BSD
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0 # BSD