diff --git a/pkgs/development/python-modules/denonavr/default.nix b/pkgs/development/python-modules/denonavr/default.nix
index 2cd72f29655b..5f113865c388 100644
--- a/pkgs/development/python-modules/denonavr/default.nix
+++ b/pkgs/development/python-modules/denonavr/default.nix
@@ -31,6 +31,8 @@ buildPythonPackage rec {
     hash = "sha256-VxoRK1qeGrIunsiCzeZJUHxW/sxk+PFpntInL+G/yI8=";
   };
 
+  pythonRelaxDeps = [ "defusedxml" ];
+
   nativeBuildInputs = [ setuptools ];
 
   propagatedBuildInputs = [