diff --git a/pkgs/development/python-modules/pymodbus/default.nix b/pkgs/development/python-modules/pymodbus/default.nix
index 7370d8a98a62..9837885ecb5f 100644
--- a/pkgs/development/python-modules/pymodbus/default.nix
+++ b/pkgs/development/python-modules/pymodbus/default.nix
@@ -21,14 +21,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "pymodbus";
-  version = "3.12.0";
+  version = "3.12.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pymodbus-dev";
     repo = "pymodbus";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-wyelHxfzmoyqp+D6v4EqJK8fL4FOuYrV57xZROGuIsY=";
+    hash = "sha256-ISfAqZu6BSuXoISo8me7Z7BjvoEj6c2KgvuScjEiqd4=";
   };
 
   __darwinAllowLocalNetworking = true;