diff --git a/pkgs/development/python-modules/syslog-rfc5424-formatter/default.nix b/pkgs/development/python-modules/syslog-rfc5424-formatter/default.nix
index 040db8d1e078..50ebc91d9e81 100644
--- a/pkgs/development/python-modules/syslog-rfc5424-formatter/default.nix
+++ b/pkgs/development/python-modules/syslog-rfc5424-formatter/default.nix
@@ -1,23 +1,29 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "syslog-rfc5424-formatter";
-  version = "1.2.2";
+  version = "1.2.3";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "easypost";
     repo = pname;
-    rev = "v${version}";
-    sha256 = "17ym5ls5r6dd9pg9frdz8myfq5fxyqlwdq1gygc9vnrxbgw2c9kb";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-dvRSOMXRmZf0vEEyX6H7OBSfo/PgyOLKuDS8X6g4qe0=";
   };
 
   # Tests are not picked up, review later again
   doCheck = false;
 
-  pythonImportsCheck = [ "syslog_rfc5424_formatter" ];
+  pythonImportsCheck = [
+    "syslog_rfc5424_formatter"
+  ];
 
   meta = with lib; {
     description = "Python logging formatter for emitting RFC5424 Syslog messages";