diff --git a/pkgs/development/python-modules/pymodbus/default.nix b/pkgs/development/python-modules/pymodbus/default.nix
index 2192cc936316..013a577200cd 100644
--- a/pkgs/development/python-modules/pymodbus/default.nix
+++ b/pkgs/development/python-modules/pymodbus/default.nix
@@ -20,7 +20,7 @@
 
 buildPythonPackage rec {
   pname = "pymodbus";
-  version = "3.8.0";
+  version = "3.8.1";
   pyproject = true;
 
   disabled = pythonOlder "3.9";
@@ -29,7 +29,7 @@ buildPythonPackage rec {
     owner = "pymodbus-dev";
     repo = "pymodbus";
     rev = "refs/tags/v${version}";
-    hash = "sha256-x7ISAQGCb6Utc4aLSZMqn9sVE15VgfI+JooDyBAU65g=";
+    hash = "sha256-WuQddane7NPqGo6EHBPlFAZDmkcksDdWmHKdVSsSf+o=";
   };
 
   postPatch = ''