diff --git a/pkgs/by-name/ir/irrd/package.nix b/pkgs/by-name/ir/irrd/package.nix
index 97b464f8f068..e0e1ba0cf06f 100644
--- a/pkgs/by-name/ir/irrd/package.nix
+++ b/pkgs/by-name/ir/irrd/package.nix
@@ -47,6 +47,18 @@ let
         doCheck = false;
       });
 
+      # ariadne 0.29+ is missing 'convert_kwargs_to_snake_case'
+      ariadne = prev.ariadne.overridePythonAttrs (oldAttrs: rec {
+        version = "0.28.0";
+        src = fetchPypi {
+          inherit (oldAttrs) pname;
+          inherit version;
+          hash = "sha256-gW66L7djPo4nHjd/UN18IPYFo956wzSqM+p1AZF/qnw=";
+        };
+        patches = [ ];
+        doCheck = false;
+      });
+
     };
   };
 in