Installation issue after Laravel 8 upgrde

[png-prakash]

I got error when install

composer require gentor/etsy-php-laravel

Error

• league/oauth1-client 1.7.0 requires guzzlehttp/guzzle ^6.0 -> satisfiable by guzzlehttp/guzzle[6.5.x-dev].
• gentor/oauth1-etsy 1.0.4 requires league/oauth1-client 1.7.0 -> satisfiable by league/oauth1-client[1.7.0].
• gentor/etsy-php-laravel dev-master requires gentor/oauth1-etsy ^1.0.4 -> satisfiable by gentor/oauth1-etsy[1.0.4].