diff --git a/requirements_dev.txt b/requirements_dev.txt
index 3e622af..305bb09 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ watchdog==0.8.3
 pylint==1.9.2
 pytest==3.6.1
 pytest-cov==2.5.1
-pytest-mock==1.10.0
+pytest-mock==3.6.0
 tox==3.0.0
 Sphinx==1.7.5
 capturer==2.4