diff --git a/pkgs/development/python-modules/cart/default.nix b/pkgs/development/python-modules/cart/default.nix
index de5d51e589d9..ddf27ae42a34 100644
--- a/pkgs/development/python-modules/cart/default.nix
+++ b/pkgs/development/python-modules/cart/default.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage rec {
   pname = "cart";
-  version = "1.2.2";
+  version = "1.2.3";
   format = "setuptools";
 
   disabled = pythonOlder "3.8";
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     owner = "CybercentreCanada";
     repo = pname;
     tag = "v${version}";
-    hash = "sha256-0dHdXb4v92681xL21FsrIkNgNQ9R5ULV1lnSCITZzP8=";
+    hash = "sha256-oeWeay1Pr9T4oR3XSrwv9hRr/sLTel1Bt6BG6jHXxIA=";
   };
 
   propagatedBuildInputs = [ pycryptodome ];
@@ -33,7 +33,7 @@ buildPythonPackage rec {
     description = "Python module for the CaRT Neutering format";
     mainProgram = "cart";
     homepage = "https://github.com/CybercentreCanada/cart";
-    changelog = "https://github.com/CybercentreCanada/cart/releases/tag/v${version}";
+    changelog = "https://github.com/CybercentreCanada/cart/releases/tag/${src.tag}";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
   };