diff --git a/packages/gitbook-v2/src/middleware.ts b/packages/gitbook-v2/src/middleware.ts
index f47ae9ed85..a50bd06835 100644
--- a/packages/gitbook-v2/src/middleware.ts
+++ b/packages/gitbook-v2/src/middleware.ts
@@ -171,6 +171,10 @@ function serveErrorResponse(error: Error) {
  *      URL is taken from the pathname.
  */
 function getSiteURLFromRequest(request: NextRequest): URLWithMode | null {
+    request.headers.forEach((value, key) => {
+        console.log('header', { key, value });
+    });
+
     const xGitbookUrl = request.headers.get('x-gitbook-url');
     if (xGitbookUrl) {
         return {