diff --git a/websockify/websockifyserver.py b/websockify/websockifyserver.py
index 5e20128..c726473 100644
--- a/websockify/websockifyserver.py
+++ b/websockify/websockifyserver.py
@@ -97,6 +97,19 @@ class WebSockifyRequestHandler(WebSocketRequestHandler, SimpleHTTPRequestHandler
         if self.logger is None:
             self.logger = WebSockifyServer.get_logger()
 
+	self.extensions_map = {
+            '.manifest': 'text/cache-manifest',
+            '.html': 'text/html',
+            '.png': 'image/png',
+            '.jpg': 'image/jpg',
+            '.svg': 'image/svg+xml',
+            '.css': 'text/css',
+            '.js': 'application/x-javascript',
+            '.json': 'application/json',
+            '.xml': 'application/xml',
+            '': 'application/octet-stream', # Default
+	}
+
         WebSocketRequestHandler.__init__(self, req, addr, server)
 
     def log_message(self, format, *args):