diff --git a/pkgs/development/python-modules/strpdatetime/default.nix b/pkgs/development/python-modules/strpdatetime/default.nix
index f7e758bd1c3f..a660acda9b8f 100644
--- a/pkgs/development/python-modules/strpdatetime/default.nix
+++ b/pkgs/development/python-modules/strpdatetime/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "strpdatetime";
-  version = "0.3.0";
+  version = "0.4.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "RhetTbull";
     repo = "strpdatetime";
-    rev = "v${version}";
-    hash = "sha256-eb3KJCFRkEt9KEP1gMQYuP50qXqItrexJhKvtJDHl9o=";
+    tag = "v${version}";
+    hash = "sha256-a+KUM9gQAcNg3ju+YyQXafDlADYCV6B+Wy7EBtcO3S4=";
   };
 
   build-system = [ poetry-core ];
@@ -32,7 +32,7 @@ buildPythonPackage rec {
   meta = {
     description = "Parse strings into Python datetime objects";
     license = lib.licenses.psfl;
-    changelog = "https://github.com/RhetTbull/strpdatetime/blob/${src.rev}/CHANGELOG.md";
+    changelog = "https://github.com/RhetTbull/strpdatetime/blob/${src.tag}/CHANGELOG.md";
     homepage = "https://github.com/RhetTbull/strpdatetime";
     maintainers = with lib.maintainers; [ sigmanificient ];
   };