diff --git a/requirements_dev.txt b/requirements_dev.txt
index 051d73f..831eb20 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ watchdog==0.8.3
 pylint==1.5.5
 pytest==2.9.1
 pytest-cov==2.2.1
-pytest-mock==1.1
+pytest-mock==1.6.0
 tox==2.1.1
 Sphinx==1.4.5
 capturer==2.1.1