diff --git a/requirements-dev.txt b/requirements-dev.txt
index 52617995..917f69b9 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,4 +4,4 @@ factory-boy-peewee==0.0.4
 flex==6.13.2
 pytest==4.1.0
 pytest-flask==0.14.0
-pytest-mock==1.10.0
+pytest-mock==3.3.0