diff --git a/README.md b/README.md
index 226a6bf..132b651 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ The SEO tag will respect any of the following if included in your site's `_confi
     publisher: 1234
    ```
 
-* `logo` - Relative URL to a site-wide logo (e.g., `/assets/your-company-logo.png`)
+* `logo` - URL to a site-wide logo (e.g., `/assets/your-company-logo.png`)
 * `social` - For [specifying social profiles](https://developers.google.com/structured-data/customize/social-profiles). The following properties are available:
   * `name` - If the user or organization name differs from the site's name
   * `links` - An array of links to social media profiles.
@@ -78,7 +78,7 @@ The SEO tag will respect the following YAML front matter if included in a post,
 
 * `title` - The title of the post, page, or document
 * `description` - A short description of the page's content
-* `image` - Relative URL to an image associated with the post, page, or document (e.g., `/assets/page-pic.jpg`)
+* `image` - URL to an image associated with the post, page, or document (e.g., `/assets/page-pic.jpg`)
 * `author` - Page-, post-, or document-specific author information (see below)
 
 ## Advanced usage
diff --git a/lib/template.html b/lib/template.html
index 809c8c6..9a625a7 100644
--- a/lib/template.html
+++ b/lib/template.html
@@ -85,11 +85,20 @@
 {% endif %}
 
 {% if site.logo %}
-    {% assign seo_site_logo = site.logo | prepend: seo_url | escape %}
+  {% assign seo_site_logo = site.logo %}
+  {% unless seo_site_logo contains "://" %}
+    {% assign seo_site_logo = seo_site_logo | prepend: seo_url %}
+  {% endunless %}
+  {% assign seo_site_logo = seo_site_logo | escape %}
 {% endif %}
 
 {% if page.image %}
-    {% assign seo_page_image = page.image.path | default: page.image.facebook | default: page.image | prepend: seo_url | escape %}
+  {% assign seo_page_image = page.image.path | default: page.image.facebook |
+default: page.image %}
+  {% unless seo_page_image contains "://" %}
+    {% assign seo_page_image = seo_page_image | prepend: seo_url %}
+  {% endunless %}
+  {% assign seo_page_image = seo_page_image | escape %}
 {% endif %}
 
 {% if seo_tag.title and seo_title %}
diff --git a/spec/jekyll_seo_tag_spec.rb b/spec/jekyll_seo_tag_spec.rb
index efb123e..355edc8 100644
--- a/spec/jekyll_seo_tag_spec.rb
+++ b/spec/jekyll_seo_tag_spec.rb
@@ -110,12 +110,21 @@ describe Jekyll::SeoTag do
       end
     end
 
-    context 'with page.image as a string' do
+    context 'with relative page.image as a string' do
       let(:page) { make_page('image' => '/img/foo.png') }
 
       it 'outputs the image' do
-        expected = %r{<meta property="og:image" content="http://example.invalid/img/foo.png" />}
-        expect(output).to match(expected)
+        expected = '<meta property="og:image" content="http://example.invalid/img/foo.png" />'
+        expect(output).to include(expected)
+      end
+    end
+
+    context 'with absolute page.image' do
+      let(:page) { make_page('image' => 'http://cdn.example.invalid/img/foo.png') }
+
+      it 'outputs the image' do
+        expected = '<meta property="og:image" content="http://cdn.example.invalid/img/foo.png" />'
+        expect(output).to include(expected)
       end
     end
 
@@ -168,6 +177,14 @@ describe Jekyll::SeoTag do
       end
     end
 
+    context 'with absolute site.logo' do
+      let(:site) { make_site('logo' => 'http://cdn.example.invalid/logo.png', 'url' => 'http://example.invalid') }
+
+      it 'outputs the logo' do
+        expect(json_data['logo']).to eql('http://cdn.example.invalid/logo.png')
+      end
+    end
+
     context 'with site.title' do
       let(:site) { make_site('title' => 'Foo', 'url' => 'http://example.invalid') }