diff --git a/ngraph/python/requirements_test.txt b/ngraph/python/requirements_test.txt
index 7ebee9a940479e..90eddeeb61df79 100644
--- a/ngraph/python/requirements_test.txt
+++ b/ngraph/python/requirements_test.txt
@@ -6,5 +6,5 @@ onnx==1.8.0
 pydocstyle==5.1.1
 pytest==6.1.2
 retrying==1.3.3
-tox==3.20.1
+tox==3.21.1
 wheel==0.35.1