diff --git a/test_reqs.txt b/test_reqs.txt
index 43e93f2..80f1216 100644
--- a/test_reqs.txt
+++ b/test_reqs.txt
@@ -1,5 +1,5 @@
 coverage==4.5.3
-mock==2.0.0
+mock==3.0.4
 flake8==3.7.7
 pep8==1.7.1
 pyflakes==2.1.1