diff --git a/src/Middleware/InjectScriptsMiddleware.php b/src/Middleware/InjectScriptsMiddleware.php
index 5c6f35b..e2a29d6 100644
--- a/src/Middleware/InjectScriptsMiddleware.php
+++ b/src/Middleware/InjectScriptsMiddleware.php
@@ -7,6 +7,7 @@
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Str;
 
 class InjectScriptsMiddleware
 {
@@ -17,6 +18,7 @@ public function handle(Request $request, Closure $next)
         if (
             Cache::get('serve_websockets_running') === true
             && $request->getMethod() === Request::METHOD_GET
+            && Str::startsWith($response->headers->get('Content-Type'), 'text/html')
             && !$request->isXmlHttpRequest()
             && !$response instanceof JsonResponse
         ) {