diff --git a/static/style.css b/static/style.css
index c142d64..37ef7f4 100644
--- a/static/style.css
+++ b/static/style.css
@@ -160,6 +160,7 @@ a {
 
 .annotation img {
   max-width: 100%;
+  height: auto;
 }
 
 .annotation ul {