def update_params(self, grads, learning_rate):
        dWz, dWr, dWh, dbz, dbr, dbh, dWhy, dby = grads

        self.wz -= learning_rate * dWz
        self.wr -= learning_rate * dWr
        self.wh -= learning_rate * dWh

        self.bz -= learning_rate * dbz
        self.br -= learning_rate * dbr
        self.bh -= learning_rate * dbh

        self.why -= learning_rate * dWhy
        self.by -= learning_rate * dby