diff --git a/requirements.txt b/requirements.txt
index c946498..2118955 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ gunicorn==19.9.0
 
 # Test dependencies
 coverage==4.5.4
-mock==3.0.5
+mock==5.1.0
 model-mommy==1.6.0
 xmlunittest==0.5.0
 vcrpy==2.1.0