diff --git a/src/plainui/styles/_util-classes.scss b/src/plainui/styles/_util-classes.scss
index d107d23035a1ec6eae830f1218a5818f3e98ccee..1baabaebac7e126ec55fcc83797fb3c469969d6a 100644
--- a/src/plainui/styles/_util-classes.scss
+++ b/src/plainui/styles/_util-classes.scss
@@ -761,6 +761,6 @@ h6,
 }
 
 .aspect-ratio-16by9 {
-    aspect-ratio: 16 / 9;
+    aspect-ratio: 1;
     object-fit: contain;
 }