diff --git a/src/atsphinx/bulma/themes/bulma_basic/sidebar/logo.html b/src/atsphinx/bulma/themes/bulma_basic/sidebar/logo.html
index 18a3224..5d4014f 100644
--- a/src/atsphinx/bulma/themes/bulma_basic/sidebar/logo.html
+++ b/src/atsphinx/bulma/themes/bulma_basic/sidebar/logo.html
@@ -1,7 +1,7 @@
 {%- if logo_url %}
 <aside class="container m-2">
-  <figure class="image mx-auto {{ theme_logo_class }}">
-    <img src="{{ logo_url }}" >
+  <figure class="image mx-auto {{ theme_logo_class }}" style="max-width: 100%; max-height: 100%;">
+    <img src="{{ logo_url }}" alt="">
   </figure>
   <p class="my-2">
     {{ theme_logo_description }}