diff --git a/_includes/panel.html b/_includes/panel.html
index 6788a25..d3b8737 100644
--- a/_includes/panel.html
+++ b/_includes/panel.html
@@ -21,7 +21,7 @@
   {% endfor %}
 
   {% if lastmod_list.size > 0 %}
-    <div id="access-lastmod" class="post mb-4"">
+    <div id="access-lastmod" class="post mb-4">
       <h3 data-toc-skip>
         {{- site.data.label.panel.lastmod -}}
       </h3>
diff --git a/_includes/related-posts.html b/_includes/related-posts.html
index d13be8f..175e122 100644
--- a/_includes/related-posts.html
+++ b/_includes/related-posts.html
@@ -56,7 +56,7 @@
             </span>
             <h3 class="pt-0 mt-2 mb-3" data-toc-skip>{{ post.title }}</h3>
             <div class="text-muted small">
-              <p>{{ post.content | markdownify | strip_html | truncate: 200 }}</p>
+              <p>{{ post.content | markdownify | strip_html | truncate: 200 | replace: '&', '&amp;' }}</p>
             </div>
           </div>
         </a>
diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index b9ceaa1..eb52b06 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -12,7 +12,7 @@
         {% if avatar | slice: 0 == '/' %}
           {% assign avatar = avatar | prepend: site.baseurl %}
         {% endif %}
-        <img src="{{ avatar }}"></img>
+        <img src="{{ avatar }}">
       </a>
     </div>
 
diff --git a/_layouts/home.html b/_layouts/home.html
index 7851104..0edfe9f 100644
--- a/_layouts/home.html
+++ b/_layouts/home.html
@@ -15,7 +15,7 @@ layout: page
     </h1>
     <div class="post-content">
       <p>
-      {{ post.content | strip_html | truncate: 200 }}
+      {{ post.content | strip_html | truncate: 200 | replace: '&', '&amp;' }}
       </p>
     </div>
 
diff --git a/_layouts/post.html b/_layouts/post.html
index db8d372..8e4c852 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -48,7 +48,7 @@ layout: default
       {% capture post_content %}
       <div class="post-content">
         {% if page.image %}
-        <img src="{{ page.image }}" class="img-rounded">
+        <img src="{{ page.image }}">
         {% endif %}
         {{ content }}
       </div>
@@ -56,7 +56,7 @@ layout: default
 
       <!-- Add lozad class into image tags. see: <https://github.com/ApoorvSaxena/lozad.js#usage> -->
       {% if post_content contains '<img src=' %}
-        {{ post_content | replace: '<img src=', '<img class="lozad" data-src=' }}
+        {{ post_content | replace: '<img src=', '<img class="lozad" src="/assets/img/commons/loading.png" data-src=' }}
       {% else %}
         {{ post_content }}
       {% endif %}
diff --git a/assets/img/commons/loading.png b/assets/img/commons/loading.png
new file mode 100644
index 0000000..7a171d1
Binary files /dev/null and b/assets/img/commons/loading.png differ