diff --git a/tox-requirements.txt b/tox-requirements.txt
index 2696a2ba..8d9f5c02 100644
--- a/tox-requirements.txt
+++ b/tox-requirements.txt
@@ -7,6 +7,6 @@ Flask
 tornado
 responses==0.12.1
 multipart==0.1
-pytest-mock==3.5.1
+pytest-mock==3.9.0
 mongomock==4.0.0
 mockredispy==2.9.3