diff --git a/pkgs/development/python-modules/jsonargparse/default.nix b/pkgs/development/python-modules/jsonargparse/default.nix
index df9708a08466..ed0f830cb914 100644
--- a/pkgs/development/python-modules/jsonargparse/default.nix
+++ b/pkgs/development/python-modules/jsonargparse/default.nix
@@ -21,16 +21,16 @@
   typeshed-client,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "jsonargparse";
-  version = "4.45.0";
+  version = "4.46.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "omni-us";
     repo = "jsonargparse";
-    tag = "v${version}";
-    hash = "sha256-bp1oQAVlFSNecE2vOyekfA8ij5Pq2PK0fasTIpoKmqs=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-YLryV70RV4TH86ysllMXyCsZp7xr1LRFwKU1PjvoilA=";
   };
 
   build-system = [ setuptools ];
@@ -79,8 +79,8 @@ buildPythonPackage rec {
   meta = {
     description = "Module to implement minimal boilerplate CLIs derived from various sources";
     homepage = "https://github.com/omni-us/jsonargparse";
-    changelog = "https://github.com/omni-us/jsonargparse/blob/${src.tag}/CHANGELOG.rst";
+    changelog = "https://github.com/omni-us/jsonargparse/blob/${finalAttrs.src.tag}/CHANGELOG.rst";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})