diff --git a/requirements-tests.txt b/requirements-tests.txt
index 901b35a..9062537 100644
--- a/requirements-tests.txt
+++ b/requirements-tests.txt
@@ -1,4 +1,4 @@
-mock==3.0.5
+mock==4.0.2
 nose==1.3.7
 selenium==3.141.0
 six==1.13.0