diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 4b483da..292bd44 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -501,7 +501,7 @@ void init_webserver()
 
   server.on("/css", []()
   {
-    server.send(200, "text/html", loadSPIFFSFile("/style.css"));
+    server.send(200, "text/css", loadSPIFFSFile("/style.css"));
   });
 
   server.on("/", []()