diff --git a/pkgs/development/python-modules/pycodestyle/default.nix b/pkgs/development/python-modules/pycodestyle/default.nix
index 7e8255121c06..32ef1d547b0b 100644
--- a/pkgs/development/python-modules/pycodestyle/default.nix
+++ b/pkgs/development/python-modules/pycodestyle/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "pycodestyle";
-  version = "2.4.0";
+  version = "2.3.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0fhy4vnlgpjq4qd1wdnl6pvdw7rah0ypmn8c9mkhz8clsndskz6b";
+    sha256 = "0rk78b66p57ala26mdldl9lafr48blv5s659sah9q50qnfjmc8k8";
   };
 
   meta = with lib; {