diff --git a/pkgs/development/python-modules/cvss/default.nix b/pkgs/development/python-modules/cvss/default.nix
index 0ada48e67d44..791bd43df9fe 100644
--- a/pkgs/development/python-modules/cvss/default.nix
+++ b/pkgs/development/python-modules/cvss/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "cvss";
-  version = "3.3";
+  version = "3.4";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "RedHatProductSecurity";
     repo = "cvss";
     tag = "v${version}";
-    hash = "sha256-+8aKNPcHFPcDyBvOO9QCVb1OIbpQHAEeJgt8fob0+lM=";
+    hash = "sha256-g6+ccoIgqs7gZPrTuKm3em+PzLvpupb9JXOGMqf2Uv0=";
   };
 
   build-system = [ setuptools ];
@@ -38,7 +38,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Library for CVSS2/3/4";
     homepage = "https://github.com/RedHatProductSecurity/cvss";
-    changelog = "https://github.com/RedHatProductSecurity/cvss/releases/tag/v${version}";
+    changelog = "https://github.com/RedHatProductSecurity/cvss/releases/tag/${src.tag}";
     license = licenses.lgpl3Plus;
     maintainers = with maintainers; [ fab ];
     mainProgram = "cvss_calculator";