diff --git a/pkgs/development/python-modules/htmldate/default.nix b/pkgs/development/python-modules/htmldate/default.nix
index adfeb0b7949e..ca648b7790d7 100644
--- a/pkgs/development/python-modules/htmldate/default.nix
+++ b/pkgs/development/python-modules/htmldate/default.nix
@@ -16,7 +16,7 @@
 
 buildPythonPackage rec {
   pname = "htmldate";
-  version = "1.9.0";
+  version = "1.9.1";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     owner = "adbar";
     repo = "htmldate";
     rev = "refs/tags/v${version}";
-    hash = "sha256-sddPlVaYenR8sQG/ronkYIcVH5nyQzcjF8rfeMr5I78=";
+    hash = "sha256-VjOqttpbHp1wQARyHieAZie/yO74+S2mDbBXx00PKWM=";
   };
 
   build-system = [ setuptools ];