diff --git a/pkgs/development/python-modules/hpack/default.nix b/pkgs/development/python-modules/hpack/default.nix
index a10882417fc0..36578856286f 100644
--- a/pkgs/development/python-modules/hpack/default.nix
+++ b/pkgs/development/python-modules/hpack/default.nix
@@ -5,11 +5,11 @@
 
 buildPythonPackage rec {
   pname = "hpack";
-  version = "3.0.0";
+  version = "4.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8eec9c1f4bfae3408a3f30500261f7e6a65912dc138526ea054f9ad98892e9d2";
+    sha256 = "fc41de0c63e687ebffde81187a948221294896f6bdc0ae2312708df339430095";
   };
 
   meta = with stdenv.lib; {