SyntaxError: Cannot use import statement outside a module

[StErMi]

I'm trying to use the SDK and execute this script

import {client} from 'defi-sdk';

const BASE_URL = 'wss://api-v4.zerion.io/';

client.configure({url: BASE_URL, apiToken: 'my_token'});

client.subscribe({
  namespace: 'address',
  body: {
    scope: ['transactions'],
    payload: {
      address: 'my_address',
      currency: 'usd',
    },
  },
  onMessage: (event, data) => {
    console.log(data);
    return;
  },
});

but when I try to execute the script via npx ts-node server/zerion2.ts I get this error

SyntaxError: Cannot use import statement outside a module
    at Object.compileFunction (node:vm:352:18)
    at wrapSafe (node:internal/modules/cjs/loader:1032:15)
    at Module._compile (node:internal/modules/cjs/loader:1067:27)
    at Module._extensions..js (node:internal/modules/cjs/loader:1157:10)
    at Object.require.extensions.<computed> [as .js] (/Users/zerion/node_modules/ts-node/src/index.ts:1608:43)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (/Users/zerion/server/zerion2.ts:1:1)