diff --git a/pkgs/development/python-modules/sievelib/default.nix b/pkgs/development/python-modules/sievelib/default.nix
index 6c47f138c706..89ff2df9f467 100644
--- a/pkgs/development/python-modules/sievelib/default.nix
+++ b/pkgs/development/python-modules/sievelib/default.nix
@@ -11,14 +11,14 @@
 
 buildPythonPackage rec {
   pname = "sievelib";
-  version = "1.4.2";
+  version = "1.4.3";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-YOoANqVRTiYQ5b9WFYbzJOdf/ZGnIJ9fueBrj+KLBrs=";
+    hash = "sha256-bFemWvAc6WbJCxPlLxT7+acDd2egcbg4FHTMWrIxBPQ=";
   };
 
   build-system = [ setuptools-scm ];