diff --git a/pkgs/development/python-modules/h2/default.nix b/pkgs/development/python-modules/h2/default.nix
index eb3682768c0c..6ba3afe39fde 100644
--- a/pkgs/development/python-modules/h2/default.nix
+++ b/pkgs/development/python-modules/h2/default.nix
@@ -11,14 +11,14 @@
 
 buildPythonPackage rec {
   pname = "h2";
-  version = "4.2.0";
+  version = "4.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "python-hyper";
     repo = "h2";
     tag = "v${version}";
-    hash = "sha256-rfCwMn2msiRoIvhsdK6hyp3BjDy5AGziX4Or0cb9bKc=";
+    hash = "sha256-04we2xeh5LtLA4La9WPfXQVczDIz7NpL/6y9TmIELgM=";
   };
 
   build-system = [ setuptools ];