403 Forbidden when I try to consume using Spring RestTemplate

I am trying to consume a web page service with RestTemplate of Spring . However I get the error 403, but if I consume the URL from PostMan then it does bring me the information without error. Does anyone know how I can solve this problem? I leave the code of the method I use to consume the URL:

 RestTemplate rt = new RestTemplate();

    HttpHeaders headers = new HttpHeaders();
    headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
    headers.set("Accept", MediaType.TEXT_HTML_VALUE);
    HttpEntity<?> entity = new HttpEntity<>(headers);

    HttpEntity<String> response = rt.exchange(URLRest, HttpMethod.GET, entity, String.class);
    return response.getBody();