diff --git a/pkgs/development/python-modules/tox/default.nix b/pkgs/development/python-modules/tox/default.nix
index 40883928f565..9dad7d77ff90 100644
--- a/pkgs/development/python-modules/tox/default.nix
+++ b/pkgs/development/python-modules/tox/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "tox";
-  version = "3.19.0";
+  version = "3.20.1";
 
   buildInputs = [ setuptools_scm ];
   propagatedBuildInputs = [ packaging pluggy py six virtualenv toml filelock ];
@@ -22,7 +22,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "17e61a93afe5c49281fb969ab71f7a3f22d7586d1c56f9a74219910f356fe7d3";
+    sha256 = "4321052bfe28f9d85082341ca8e233e3ea901fdd14dab8a5d3fbd810269fbaf6";
   };
 
   meta = with lib; {