diff --git a/test_requirements.txt b/test_requirements.txt
index 5be44d270..a6d9d8bd6 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,5 +1,5 @@
 pytest==3.4.0
 pytest-cov==2.5.1
-coverage==4.5
+coverage==4.5.1
 pytest-xdist==1.22.0
 hypothesis