diff --git a/extra/shell.html b/extra/shell.html
index 6b37b04..fe0a3b2 100644
--- a/extra/shell.html
+++ b/extra/shell.html
@@ -239,9 +239,9 @@
                 document.body.appendChild(s);
 
                 getLazyAsset('gameasync/bitmap-map.js', 'Primary assets', () => {
-                        const s = document.createElement('script');
-                        s.setAttribute('src', 'gameasync/bitmap-map.js');
-                        document.body.appendChild(s);
+                    const s = document.createElement('script');
+                    s.setAttribute('src', 'gameasync/bitmap-map.js');
+                    document.body.appendChild(s);
                 });
             });
         }, 200);