diff --git a/pkgs/development/python-modules/hstspreload/default.nix b/pkgs/development/python-modules/hstspreload/default.nix
index 7b92aeb269df..ecdfb790ebca 100644
--- a/pkgs/development/python-modules/hstspreload/default.nix
+++ b/pkgs/development/python-modules/hstspreload/default.nix
@@ -6,14 +6,14 @@
 
 buildPythonPackage rec {
   pname = "hstspreload";
-  version = "2021.8.1";
+  version = "2021.9.1";
   disabled = isPy27;
 
   src = fetchFromGitHub {
     owner = "sethmlarson";
     repo = pname;
     rev = version;
-    sha256 = "0si22p461qydh874gkidiar89hrfx7lm7r7g6d1qi7lz8wlwcplv";
+    sha256 = "sha256-CZlXnRe4yA6VJF48t73m2PbBRFzg0XTgT7J1N83Ojc4=";
   };
 
   # tests require network connection