diff --git a/setup.py b/setup.py
index 8e240e0..2705806 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
                           "docopt==0.6.2",
                           "gitdb==0.6.4",
                           "GitPython==2.0.2",
-                          "mock==2.0.0",
+                          "mock==5.0.2",
                           "multi-key-dict==2.0.3",
                           "packaging==16.8",
                           "pathtools==0.1.2",