diff --git a/requirements-dev.txt b/requirements-dev.txt
index 133cd16..ff38f04 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,7 +10,7 @@ six==1.12.0
 attrs==19.1.0
 pluggy==0.9.0
 pytest==4.4.0
-pytest-mock==1.10.3
+pytest-mock==3.15.1
 
 
 #Coverage