diff --git a/lib/w3cjs.js b/lib/w3cjs.js
index 936031b..0528a37 100644
--- a/lib/w3cjs.js
+++ b/lib/w3cjs.js
@@ -68,7 +68,7 @@ var getRequest = function(isLocal, options) {
    }
 
    req.set('User-Agent', 'w3cjs - npm module');
-   req.set('Content-Type', 'text/html; encoding=utf-8');
+   req.set('Content-Type', 'text/html; charset=utf-8');
 
    return req;
 }