diff --git a/requirements_dev.txt b/requirements_dev.txt
index 35e787d..b324ac0 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ black==19.10b0
 coverage==5.0.3
 cryptography==2.8
 flask==1.1.1
-mock==4.0.1
+mock==4.0.2
 pip==20.0.2
 plumbum==1.6.8
 pytest==5.3.5