diff --git a/build/demo.js b/build/demo.js
index 39fdc93..2960143 100644
--- a/build/demo.js
+++ b/build/demo.js
@@ -6,7 +6,7 @@ function popupResult(src, viewport) {
     if (bodyEl === null) {
         throw new Error("bodyEl is null");
     }
-    bodyEl.innerHTML = `<img src="${src}" class="img-fluid ${imgClass}" width="320" />`;
+    bodyEl.innerHTML = `<img src="${src}" class="${imgClass}" style="max-width: min(100%, 320px); max-height: 320px;" />`;
     resultModal.show();
 }
 let photos = [