diff --git a/frontend/web/components/modals/CreateSAML.tsx b/frontend/web/components/modals/CreateSAML.tsx
index 1cec348fa40b..6ee7145d39d5 100644
--- a/frontend/web/components/modals/CreateSAML.tsx
+++ b/frontend/web/components/modals/CreateSAML.tsx
@@ -55,7 +55,10 @@ const CreateSAML: FC<CreateSAML> = ({ organisationId, samlName }) => {
     { skip: !samlName },
   )
 
-  const acsUrl = new URL(`/auth/saml/${name}/response/`, Project.api).href
+  const acsUrl = new URL(
+    `./auth/saml/${name}/response/`,
+    new Request(Project.api).url, // Project.api can be relative, e.g. /api/v1/
+  ).href
   const copyAcsUrl = async () => {
     await navigator.clipboard.writeText(acsUrl)
     toast('Copied to clipboard')