diff --git a/pkgs/development/python-modules/pyutil/default.nix b/pkgs/development/python-modules/pyutil/default.nix
index 64ce8a20fdeb..03ef8b58d741 100644
--- a/pkgs/development/python-modules/pyutil/default.nix
+++ b/pkgs/development/python-modules/pyutil/default.nix
@@ -14,12 +14,12 @@
 
 buildPythonPackage rec {
   pname = "pyutil";
-  version = "3.3.6";
+  version = "3.4.1";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-XcPWu5xbq6u10Ldz4JQEXXVxLos0ry0psOKGAmaCZ8A=";
+    hash = "sha256-8RHsCEieQ3/uHPkNai+sUBR2hDJAVrYy5DMlp6YRw6c=";
   };
 
   prePatch = lib.optionalString isPyPy ''