diff --git a/pkgs/development/python-modules/pyomo/default.nix b/pkgs/development/python-modules/pyomo/default.nix
index 3a9a80d57812..23283ab2f5a8 100644
--- a/pkgs/development/python-modules/pyomo/default.nix
+++ b/pkgs/development/python-modules/pyomo/default.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage rec {
   pname = "pyomo";
-  version = "6.4.1";
+  version = "6.4.2";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     repo = "pyomo";
     owner = "pyomo";
     rev = "refs/tags/${version}";
-    hash = "sha256-LwlUib/CeVCCmgpTHtYHcFyxk9Esx1zhZ3yGHeGpugY=";
+    hash = "sha256-YTcK5UCE6AuGk3iyhLOeqdl0rb8ccOhBRJEew40Rris=";
   };
 
   propagatedBuildInputs = [