_layouts/post.html in jekyll-theme-hamilton-3.1.0 vs _layouts/post.html in jekyll-theme-hamilton-4.0.0

@@ -10,13 +10,13 @@
     <p class="post-meta">
       {%- assign date_format = site.date_format | default: "%b %-d, %Y" -%}
       <time class="dt-published" datetime="{{ page.date | date_to_xmlschema }}" itemprop="datePublished">
         {{ page.date | date: date_format }}
       </time>
-      {%- if page.modified_date -%}
+      {%- if page.last_modified_at -%}
         ~ 
-        {%- assign mdate = page.modified_date | date_to_xmlschema -%}
+        {%- assign mdate = page.last_modified_at | date_to_xmlschema -%}
         <time class="dt-modified" datetime="{{ mdate }}" itemprop="dateModified">
           {{ mdate | date: date_format }}
         </time>
       {%- endif -%}
       {%- if page.author -%}
@@ -78,10 +78,10 @@
         </a>
       {% endif %}
     </nav>
   </footer>
 
-  {% if page.comments != false and jekyll.environment == "production" %}
+  {% if page.comments != false and jekyll.environment == "production" and site.disqus %}
     {% include disqus.html %}
   {% endif %}
   
 </article>