diff --git a/_includes/archive-single.html b/_includes/archive-single.html
index 60b63f91..a3f5272e 100644
--- a/_includes/archive-single.html
+++ b/_includes/archive-single.html
@@ -16,7 +16,7 @@
       {% if include.type == "grid" and teaser != blank %}
         <div class="archive__item-teaser">
           <img src=
-            {% if teaser contains "http" %}
+            {% if teaser contains "://" %}
               "{{ teaser }}"
             {% else %}
               "{{ teaser | prepend: "/images/" | prepend: base_path }}"
diff --git a/_includes/author-profile.html b/_includes/author-profile.html
index 2deed90b..5efe4c84 100644
--- a/_includes/author-profile.html
+++ b/_includes/author-profile.html
@@ -7,7 +7,7 @@
 <div itemscope itemtype="http://schema.org/Person">
 
   <div class="author__avatar">
-    {% if author.avatar contains "http" %}
+    {% if author.avatar contains "://" %}
     	<img src="{{ author.avatar }}" alt="{{ author.name }}">
     {% else %}
     	<img src="{{ author.avatar | prepend: "/images/" | prepend: base_path }}" class="author__avatar" alt="{{ author.name }}">
diff --git a/_includes/feature_row b/_includes/feature_row
index 798ac44e..10592b7e 100644
--- a/_includes/feature_row
+++ b/_includes/feature_row
@@ -10,7 +10,7 @@
 
   {% for f in feature_row %}
 
-    {% if f.url contains "http" %}
+    {% if f.url contains "://" %}
       {% capture f_url %}{{ f.url }}{% endcapture %}
     {% else %}
       {% capture f_url %}{{ f.url | prepend: base_path }}{% endcapture %}
@@ -21,7 +21,7 @@
         {% if f.image_path %}
           <div class="archive__item-teaser">
             <img src=
-              {% if f.image_path contains "http" %}
+              {% if f.image_path contains "://" %}
                 "{{ f.image_path }}"
               {% else %}
                 "{{ f.image_path | prepend: "/images/" | prepend: base_path }}"
diff --git a/_includes/gallery b/_includes/gallery
index f1ef8c10..d8454145 100644
--- a/_includes/gallery
+++ b/_includes/gallery
@@ -20,7 +20,7 @@
   {% for img in gallery %}
     {% if img.url %}
       <a href=
-        {% if img.url contains "http" %}
+        {% if img.url contains "://" %}
           "{{ img.url }}"
         {% else %}
           "{{ img.url | prepend: "/images/" | prepend: base_path }}"
@@ -28,7 +28,7 @@
         {% if img.title %}title="{{ img.title }}"{% endif %}
       >
         <img src=
-          {% if img.image_path contains "http" %}
+          {% if img.image_path contains "://" %}
             "{{ img.image_path }}"
           {% else %}
             "{{ img.image_path | prepend: "/images/" | prepend: base_path }}"
@@ -37,7 +37,7 @@
       </a>
     {% else %}
       <img src=
-        {% if img.image_path contains "http" %}
+        {% if img.image_path contains "://" %}
           "{{ img.image_path }}"
         {% else %}
           "{{ img.image_path | prepend: "/images/" | prepend: base_path }}"
diff --git a/_includes/nav_list b/_includes/nav_list
index 60399880..91228ba8 100644
--- a/_includes/nav_list
+++ b/_includes/nav_list
@@ -8,7 +8,7 @@
       <li>
         {% if nav.url %}
           {% comment %}internal/external URL check{% endcomment %}
-          {% if nav.url contains "http" %}
+          {% if nav.url contains "://" %}
             {% assign domain = "" %}
           {% else %}
             {% assign domain = base_path %}
@@ -23,7 +23,7 @@
         <ul>
           {% for child in nav.children %}
             {% comment %}internal/external URL check{% endcomment %}
-            {% if child.url contains "http" %}
+            {% if child.url contains "://" %}
               {% assign domain = "" %}
             {% else %}
               {% assign domain = base_path %}
@@ -43,6 +43,4 @@
       </li>
     {% endfor %}
   </ul>
-</nav>
-
-
+</nav>
\ No newline at end of file
diff --git a/_includes/page__hero.html b/_includes/page__hero.html
index bdbf130b..6cc1ee7e 100644
--- a/_includes/page__hero.html
+++ b/_includes/page__hero.html
@@ -1,18 +1,18 @@
 {% include base_path %}
 
-{% if page.header.image contains "http" %}
+{% if page.header.image contains "://" %}
   {% capture img_path %}{{ page.header.image }}{% endcapture %}
 {% else %}
   {% capture img_path %}{{ page.header.image | prepend: "/images/" | prepend: base_path }}{% endcapture %}
 {% endif %}
 
-{% if page.header.cta_url contains "http" %}
+{% if page.header.cta_url contains "://" %}
   {% capture cta_path %}{{ page.header.cta_url }}{% endcapture %}
 {% else %}
   {% capture cta_path %}{{ page.header.cta_url | prepend: base_path }}{% endcapture %}
 {% endif %}
 
-{% if page.header.overlay_image contains "http" %}
+{% if page.header.overlay_image contains "://" %}
   {% capture overlay_img_path %}{{ page.header.overlay_image }}{% endcapture %}
 {% elsif page.header.overlay_image %}
   {% capture overlay_img_path %}{{ page.header.overlay_image | prepend: "/images/" | prepend: base_path }}{% endcapture %}
@@ -52,4 +52,4 @@
   {% if page.header.caption %}
     <span class="page__hero-caption">{{ page.header.caption | markdownify | remove: "<p>" | remove: "</p>" }}</span>
   {% endif %}
-</div>
+</div>
\ No newline at end of file
diff --git a/_includes/seo.html b/_includes/seo.html
index f914ce36..8073725a 100644
--- a/_includes/seo.html
+++ b/_includes/seo.html
@@ -60,7 +60,7 @@
 
   {% if page.header.image %}
     <meta name="twitter:card" content="summary_large_image">
-    <meta name="twitter:image" content="{% if page.header.image contains "http" %}{{ page.header.image }}{% else %}{{ page.header.image | prepend: "/images/" | prepend: base_path }}{% endif %}">
+    <meta name="twitter:image" content="{% if page.header.image contains "://" %}{{ page.header.image }}{% else %}{{ page.header.image | prepend: "/images/" | prepend: base_path }}{% endif %}">
   {% else %}
     <meta name="twitter:card" content="summary">
     {% if site.og_image %}
@@ -84,7 +84,7 @@
 {% endif %}
 
 {% if page.header.image %}
-  <meta property="og:image" content="{% if page.header.image contains "http" %}{{ page.header.image }}{% else %}{{ page.header.image | prepend: "/images/" | prepend: base_path }}{% endif %}">
+  <meta property="og:image" content="{% if page.header.image contains "://" %}{{ page.header.image }}{% else %}{{ page.header.image | prepend: "/images/" | prepend: base_path }}{% endif %}">
 {% endif %}
 
 {% if page.date %}
diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index 445dd207..b8ee39ab 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -7,7 +7,7 @@
     {% for s in page.sidebar %}
       {% if s.image %}
         <img src=
-        {% if s.image contains "http" %}
+        {% if s.image contains "://" %}
           "{{ s.image }}"
         {% else %}
           "{{ s.image | prepend: "/images/" | prepend: base_path }}"