Change parameter 'param' type to 'java.lang.Object'

Есть такой код

public static void call_me() throws Exception {
        URL url = new URL("http://httpbin.org/post");
        Map params = new LinkedHashMap<String, Object>();
        params.put("name", "Jinu Jawad");
        params.put("email", "helloworld@gmail.com");
        params.put("CODE", 1111);
        params.put("message", "Hello Post Test success");
        StringBuilder postData = new StringBuilder();
        for (Map.Entry<String, Object> param : params.entrySet()) {
            if (postData.length() != 0) postData.append('&');
            postData.append(URLEncoder.encode(param.getKey(), "UTF-8"));
            postData.append('=');
            postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8"));
        }

Map.Entry - компилятор пишет

Error:(29, 63) java: incompatible types: java.lang.Object cannot be converted to java.util.Map.Entry

как это исправить?