diff --git a/javascript/imageviewer.js b/javascript/imageviewer.js
index aac2ee82..28e748b7 100644
--- a/javascript/imageviewer.js
+++ b/javascript/imageviewer.js
@@ -11,7 +11,7 @@ function showModal(event) {
     if (modalImage.style.display === 'none') {
         lb.style.setProperty('background-image', 'url(' + source.src + ')');
     }
-    lb.style.display = "block";
+    lb.style.display = "flex";
     lb.focus()
 
     const tabTxt2Img = gradioApp().getElementById("tab_txt2img")
diff --git a/style.css b/style.css
index fc0f47a6..2f26ad02 100644
--- a/style.css
+++ b/style.css
@@ -436,9 +436,7 @@ input[type="range"]{
 
 #modalImage {
     display: block;
-    margin-left: auto;
-    margin-right: auto;
-    margin-top: auto;
+    margin: auto;
     width: auto;
 }