diff --git a/src/mdast-process-images.js b/src/mdast-process-images.js
index 9ed5ead..a97e738 100644
--- a/src/mdast-process-images.js
+++ b/src/mdast-process-images.js
@@ -39,7 +39,7 @@ export async function processImages(log, tree, mediaHandler, baseUrl) {
   visit(tree, (node) => {
     if (node.type === 'image') {
       const { url = '' } = node;
-      if (url.indexOf(':') < 0) {
+      if (url.indexOf(':') < 0 || url.startsWith('/')) {
         // eslint-disable-next-line no-param-reassign
         node.url = new URL(url, baseUrl).href;
         register(node);
diff --git a/test/fixtures/images.html b/test/fixtures/images.html
index 798c937..b721bfb 100644
--- a/test/fixtures/images.html
+++ b/test/fixtures/images.html
@@ -32,6 +32,9 @@ <h1>Hello, World.</h1>
         <picture>
             <img src="https://about:error">
         </picture>
+        <picture>
+            <img src="/adobe/assets/urn:aaid:aem:abcd">
+        </picture>
     </div>
 </main>
 </body>
diff --git a/test/fixtures/images.md b/test/fixtures/images.md
index f981edf..d1d198e 100644
--- a/test/fixtures/images.md
+++ b/test/fixtures/images.md
@@ -16,6 +16,8 @@
 
 ![][image1]
 
+![][image0]
+
 +-----------------------------------------+
 | Metadata                                |
 +-----------+-----------------------------+
diff --git a/test/index.test.js b/test/index.test.js
index 8ab80f5..445258a 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -105,6 +105,10 @@ describe('Index Tests', () => {
             'content-type': 'image/png',
           })
           .get('/blog/relative.png')
+          .replyWithFile(200, testImagePath, {
+            'content-type': 'image/png',
+          })
+          .get('/adobe/assets/urn:aaid:aem:abcd')
           .replyWithFile(200, testImagePath, {
             'content-type': 'image/png',
           });
@@ -115,10 +119,10 @@ describe('Index Tests', () => {
           });
         nock('https://helix-media-bus.s3.us-east-1.amazonaws.com')
           .head('/foo-id/1c2e2c6c049ccf4b583431e14919687f3a39cc227')
-          .times(4)
+          .times(5)
           .reply(404)
           .put('/foo-id/1c2e2c6c049ccf4b583431e14919687f3a39cc227?x-id=PutObject')
-          .times(4)
+          .times(5)
           .reply(201);
 
         const expected = await readFile(resolve(__testdir, 'fixtures', 'images.md'), 'utf-8');
@@ -127,7 +131,7 @@ describe('Index Tests', () => {
         assert.strictEqual((await result.text()).trim(), expected.trim());
         assert.deepStrictEqual(result.headers.plain(), {
           'cache-control': 'no-store, private, must-revalidate',
-          'content-length': '824',
+          'content-length': '837',
           'content-type': 'text/markdown; charset=utf-8',
           'last-modified': 'Sat, 22 Feb 2031 15:28:00 GMT',
           'x-source-location': 'https://www.example.com/blog/article',
@@ -166,6 +170,11 @@ describe('Index Tests', () => {
             'content-type': 'image/png',
           })
           .get('/blog/relative.png')
+          .replyWithFile(200, testImagePath, {
+            'content-type': 'image/png',
+          })
+          .get('/adobe/assets/urn:aaid:aem:abcd')
+          .basicAuth({ user: 'john', pass: 'doe' })
           .replyWithFile(200, testImagePath, {
             'content-type': 'image/png',
           });
@@ -176,10 +185,10 @@ describe('Index Tests', () => {
           });
         nock('https://helix-media-bus.s3.us-east-1.amazonaws.com')
           .head('/foo-id/1c2e2c6c049ccf4b583431e14919687f3a39cc227')
-          .times(4)
+          .times(5)
           .reply(404)
           .put('/foo-id/1c2e2c6c049ccf4b583431e14919687f3a39cc227?x-id=PutObject')
-          .times(4)
+          .times(5)
           .reply(201);
 
         const expected = await readFile(resolve(__testdir, 'fixtures', 'images.md'), 'utf-8');
@@ -188,7 +197,7 @@ describe('Index Tests', () => {
         assert.strictEqual((await result.text()).trim(), expected.trim());
         assert.deepStrictEqual(result.headers.plain(), {
           'cache-control': 'no-store, private, must-revalidate',
-          'content-length': '824',
+          'content-length': '837',
           'content-type': 'text/markdown; charset=utf-8',
           'last-modified': 'Sat, 22 Feb 2031 15:28:00 GMT',
           'x-source-location': 'https://www.example.com/blog/article',