diff --git a/app/views/editors/KeyframeView.html b/app/views/editors/KeyframeView.html
index 7ffa99f..6565a4a 100644
--- a/app/views/editors/KeyframeView.html
+++ b/app/views/editors/KeyframeView.html
@@ -10,7 +10,7 @@
     }
     .kf-editor > article, .kf-editor > article header{ border-color: #473; }
     .kf-editor article.agent-preview header { padding:0; }
-    .kf-editor article.agent-preview canvas{ width:100%; height:100%; } 
+    .kf-editor article.agent-preview canvas{ width:100%; aspect-ratio: 1 / 1;} 
 
 </style>
 <div class="kf-editor cols-3">