diff --git a/requirements.txt b/requirements.txt
index 71e540c..e3adfe5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ m2r==0.3.1
 MarkupSafe==2.1.3
 mccabe==0.6.1
 mistune==0.8.4
-mock==2.0.0
+mock==5.1.0
 multidict==5.1.0
 packaging==21.0
 pbr==5.11.1
diff --git a/setup.py b/setup.py
index 16841db..598a1d5 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 ]
 
 tests_require = [
-    "mock==2.0.0",
+    "mock==5.1.0",
     "flake8==3.7.9",
 ]