diff --git a/lib/parameters.js b/lib/parameters.js
index e0751fd..0eb30b2 100644
--- a/lib/parameters.js
+++ b/lib/parameters.js
@@ -32,17 +32,14 @@ function findOptionalArgs(opts, find) {
 }
 
 function getFetchOptions(isCrawler) {
-    const fetchOptions = {};
-    const headers = {
-        'accept': 'text/html',
+    const fetchOptions = {
+        headers: {
+            'accept': 'text/html',
+        },
     };
 
     if (typeof isCrawler === 'boolean' && isCrawler) {
-        headers['user-agent'] = CRAWLER_USER_AGENT;
-    }
-
-    if (Object.keys(headers).length !== 0) {
-        fetchOptions.headers = headers;
+        fetchOptions.headers['user-agent'] = CRAWLER_USER_AGENT;
     }
 
     return fetchOptions;