diff --git a/requirements-dev.txt b/requirements-dev.txt
index e070445..d558609 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@ contexttimer
 coverage
 flake8
 importanize
-mock==1.0.1
+mock==1.1.3
 nose
 rednose
 sphinx