diff --git a/rhodecode/public/css/readme-box.less b/rhodecode/public/css/readme-box.less
--- a/rhodecode/public/css/readme-box.less
+++ b/rhodecode/public/css/readme-box.less
@@ -94,6 +94,7 @@ div.readme_box img {
   border-style: none;
   background-color: #fff;
   padding-right: 20px;
+  max-width: 100%;
 }