diff --git a/pkgs/development/python-modules/hstspreload/default.nix b/pkgs/development/python-modules/hstspreload/default.nix
index 7c2c7d66350a..e30435c568c7 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 = "2021.5.24";
+  version = "2021.5.31";
   disabled = isPy27;
 
   src = fetchFromGitHub {
     owner = "sethmlarson";
     repo = pname;
     rev = version;
-    sha256 = "sha256-Z1v2p8kn0IO38Cgr4tUp2n3zAiQntkskS7kYPUakC5U=";
+    sha256 = "sha256-qTOzhPET2uj/ST28pzeckFTYYfyPgErvG4HB9zMMB2w=";
   };
 
   # tests require network connection