diff --git a/pkgs/development/python-modules/systemdunitparser/default.nix b/pkgs/development/python-modules/systemdunitparser/default.nix
index 0b3431c06680..b3e008f0d744 100644
--- a/pkgs/development/python-modules/systemdunitparser/default.nix
+++ b/pkgs/development/python-modules/systemdunitparser/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "systemdunitparser";
-  version = "0.3";
+  version = "0.4";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "sgallagher";
     repo = "systemdunitparser";
-    rev = version;
-    hash = "sha256-lcvXEieaifPUDhLdaz2FXaNdbw7wKR+x/kC+MMDT0tE=";
+    tag = version;
+    hash = "sha256-BlOj1rvRfh0SQ7io2N8MsMvAtWvXk0V6hYzlOSrr7hU=";
   };
 
   build-system = [