diff --git a/material/templates/blog-post.html b/material/templates/blog-post.html
index 6804a6af9..dcaefc457 100644
--- a/material/templates/blog-post.html
+++ b/material/templates/blog-post.html
@@ -24,7 +24,7 @@
                 {% for author in page.authors %}
                   <div class="md-profile md-post__profile">
                     <span class="md-author md-author--long">
-                      <img src="{{ author.avatar }}" alt="{{ author.name }}">
+                      <img src="{{ author.avatar | url }}" alt="{{ author.name }}">
                     </span>
                     <span class="md-profile__description">
                       <strong>
diff --git a/material/templates/partials/post.html b/material/templates/partials/post.html
index 772a0a8c1..a5581ee97 100644
--- a/material/templates/partials/post.html
+++ b/material/templates/partials/post.html
@@ -7,7 +7,7 @@
       <nav class="md-post__authors md-typeset">
         {% for author in post.authors %}
           <span class="md-author">
-            <img src="{{ author.avatar }}" alt="{{ author.name }}">
+            <img src="{{ author.avatar | url }}" alt="{{ author.name }}">
           </span>
         {% endfor %}
       </nav>
diff --git a/src/templates/blog-post.html b/src/templates/blog-post.html
index a85928034..3ae47b3d4 100644
--- a/src/templates/blog-post.html
+++ b/src/templates/blog-post.html
@@ -56,7 +56,7 @@
                 {% for author in page.authors %}
                   <div class="md-profile md-post__profile">
                     <span class="md-author md-author--long">
-                      <img src="{{ author.avatar }}" alt="{{ author.name }}" />
+                      <img src="{{ author.avatar | url }}" alt="{{ author.name }}" />
                     </span>
                     <span class="md-profile__description">
                       <strong>
diff --git a/src/templates/partials/post.html b/src/templates/partials/post.html
index 20e7141a6..8d3745730 100644
--- a/src/templates/partials/post.html
+++ b/src/templates/partials/post.html
@@ -29,7 +29,7 @@
       <nav class="md-post__authors md-typeset">
         {% for author in post.authors %}
           <span class="md-author">
-            <img src="{{ author.avatar }}" alt="{{ author.name }}" />
+            <img src="{{ author.avatar | url }}" alt="{{ author.name }}" />
           </span>
         {% endfor %}
       </nav>