Laravel FormRequest on PUT request failing - php

Question

I am building a RESTful API with Laravel 5.8 I am using FormRequests to validate the users input to my POST & PUT requests. The POST works absolutely perfectly, but the PUT request are failing with the following error,
"message": "Too few arguments to function App\Http\Requests\ProjectStoreRequest::Illuminate\Foundation\Providers\{closure}(), 0 passed and exactly 1 expected"
The method my PUT requests gets routed looks like this (and the URL is /api/projects/{id}),
public function update(ProjectStoreRequest $request, $id)
{
$validated = $request->validate();
$project = Project::find($id);
$project->title = $request->title;
$project->due_date = Carbon::parse(strtotime($request->due_date))->format('Y-m-d');
$project->save();
return response()->json(['message' => 'Project updated', 'data' => $project], 200);
}
And the ProjectStoreRequest looks like this,
class ProjectStoreRequest extends FormRequest
{
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
return [
'title' => 'required|string',
'due_date' => 'date'
];
}
}