diff --git a/lib/cors-anywhere.js b/lib/cors-anywhere.js
index 1a4c490..4f8da67 100644
--- a/lib/cors-anywhere.js
+++ b/lib/cors-anywhere.js
@@ -201,7 +201,7 @@ var getHandler = exports.getHandler = function(options, proxy) {
     originWhitelist: [],      // If non-empty, requests not from an origin in this list will be blocked.
     requireHeader: null,      // Require a header to be set?
     removeHeaders: [],        // Strip these request headers.
-    setHeaders: []            // Set these request headers.
+    setHeaders: {}            // Set these request headers.
   };
   if (options) {
     Object.keys(corsAnywhere).forEach(function(option) {