diff --git a/README.md b/README.md
index 4959b0a..9b0b006 100644
--- a/README.md
+++ b/README.md
@@ -216,18 +216,20 @@ directory. This script will serve the tree locally.
 from http.server import HTTPServer, SimpleHTTPRequestHandler
 import sys
 
-
 class CORSRequestHandler(SimpleHTTPRequestHandler):
-    
+
     def end_headers(self):
         self.send_header('Access-Control-Allow-Origin', '*')
-        self.send_header('Access-Control-Allow-Methods', '*')
-        self.send_header('Access-Control-Allow-Headers', '*')
+        self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
+        self.send_header('Access-Control-Allow-Headers', 'Content-Type, Authorization')
         self.send_header('Cache-Control', 'no-store, no-cache, must-revalidate')
         return super(CORSRequestHandler, self).end_headers()
 
     def do_OPTIONS(self):
         self.send_response(200)
+        self.send_header('Access-Control-Allow-Origin', '*')
+        self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
+        self.send_header('Access-Control-Allow-Headers', 'Content-Type, Authorization')
         self.end_headers()
 
 host = sys.argv[1] if len(sys.argv) > 2 else '0.0.0.0'