diff --git a/dev-requirements.txt b/dev-requirements.txt
index a045efe..d6c90fa 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,4 +1,4 @@
-coverage==3.7.1
+coverage==4.0
 mock==1.3.0
 nose==1.3.7
 testfixtures==4.2.0