diff --git a/pkgs/tools/misc/lektor/default.nix b/pkgs/tools/misc/lektor/default.nix
index 1b20b4355d8e..aef55ffb9b1f 100644
--- a/pkgs/tools/misc/lektor/default.nix
+++ b/pkgs/tools/misc/lektor/default.nix
@@ -20,7 +20,8 @@ let
       });
     };
   };
-in python.pkgs.buildPythonApplication rec {
+in
+python.pkgs.buildPythonApplication rec {
   pname = "lektor";
   version = "3.4.0b8";
   format = "pyproject";
@@ -70,6 +71,11 @@ in python.pkgs.buildPythonApplication rec {
     pytest-click
     pytest-mock
     pytestCheckHook
+    pythonRelaxDepsHook
+  ];
+
+  pythonRelaxDeps = [
+    "werkzeug"
   ];
 
   postInstall = ''