diff --git a/lib/tpl/dokuwiki/css/basic.css b/lib/tpl/dokuwiki/css/basic.css
index c8e0c435efa5bb89c04e89092b38f0f315bc6f50..7ffe42ec49c7e8541677e705b0163f78469509aa 100644
--- a/lib/tpl/dokuwiki/css/basic.css
+++ b/lib/tpl/dokuwiki/css/basic.css
@@ -195,6 +195,7 @@ img {
 img,
 object {
     max-width: 100%;
+    height: auto;
 }
 
 hr {