diff --git a/.changeset/forty-turtles-drive.md b/.changeset/forty-turtles-drive.md
new file mode 100644
index 000000000..8ccbac0d5
--- /dev/null
+++ b/.changeset/forty-turtles-drive.md
@@ -0,0 +1,5 @@
+---
+"citation-js-utils": patch
+---
+
+Avoid repeated `https://doi.org/https://doi.org/...`
diff --git a/packages/citation-js-utils/src/index.ts b/packages/citation-js-utils/src/index.ts
index d4e496a2b..d32c7042d 100644
--- a/packages/citation-js-utils/src/index.ts
+++ b/packages/citation-js-utils/src/index.ts
@@ -1,4 +1,5 @@
 import { Cite } from '@citation-js/core';
+import { doi as doiUtils } from 'doi-utils';
 import { clean as cleanCSL } from '@citation-js/core/lib/plugins/input/csl.js';
 import sanitizeHtml from 'sanitize-html';
 
@@ -121,7 +122,7 @@ export type CitationRenderer = Record<
 >;
 
 function doiUrl(doi?: string) {
-  return doi ? `https://doi.org/${doi}` : undefined;
+  return doi ? doiUtils.buildUrl(doi) : undefined;
 }
 
 function wrapWithAnchorTag(url: string, text?: string) {
diff --git a/packages/citation-js-utils/tests/basic.spec.ts b/packages/citation-js-utils/tests/basic.spec.ts
index a1fccb717..359eea267 100644
--- a/packages/citation-js-utils/tests/basic.spec.ts
+++ b/packages/citation-js-utils/tests/basic.spec.ts
@@ -40,6 +40,7 @@ describe('Test reference rendering', () => {
     const data = parseBibTeX(src);
     const citations = await getCitationRenderers(data);
     expect(citations['cury2020sparse'].getDOI()).toBe(TEST_DOI_IN_OTHER_FIELD);
+    expect(citations['cury2020sparse'].getURL()).toBe(`https://doi.org/${TEST_DOI_IN_OTHER_FIELD}`);
   });
 });
 
diff --git a/packages/myst-transforms/src/links/doi.ts b/packages/myst-transforms/src/links/doi.ts
index 324325d26..61d02ec47 100644
--- a/packages/myst-transforms/src/links/doi.ts
+++ b/packages/myst-transforms/src/links/doi.ts
@@ -4,7 +4,6 @@ import type { VFile } from 'vfile';
 import type { Link, LinkTransformer } from './types.js';
 import { updateLinkTextIfEmpty } from './utils.js';
 
-const DOI_ORG = 'https://doi.org/';
 const TRANSFORM_SOURCE = 'LinkTransform:DOITransformer';
 
 export class DOITransformer implements LinkTransformer {
@@ -21,8 +20,8 @@ export class DOITransformer implements LinkTransformer {
 
   transform(link: Link, file: VFile): boolean {
     const urlSource = link.urlSource || link.url;
-    const doiString = doi.normalize(urlSource);
-    if (!doiString) {
+    const doiUrl = doi.buildUrl(urlSource);
+    if (!doiUrl) {
       fileError(file, `DOI is not valid: ${urlSource}`, {
         node: link,
         source: TRANSFORM_SOURCE,
@@ -30,8 +29,8 @@ export class DOITransformer implements LinkTransformer {
       });
       return false;
     }
-    link.url = `${DOI_ORG}${doiString}`;
-    link.data = { doi: doiString };
+    link.url = doiUrl;
+    link.data = { doi: doi.normalize(doiUrl) };
     link.internal = false;
     updateLinkTextIfEmpty(link, '');
     return true;