diff --git a/striker-ui-api/src/lib/request_handlers/manifest/buildManifest.ts b/striker-ui-api/src/lib/request_handlers/manifest/buildManifest.ts
index a6fcda08..60d16ddc 100644
--- a/striker-ui-api/src/lib/request_handlers/manifest/buildManifest.ts
+++ b/striker-ui-api/src/lib/request_handlers/manifest/buildManifest.ts
@@ -51,7 +51,7 @@ export const buildManifest = async (
 
   const manifestUuid = sanitize(rawManifestUuid, 'string');
   assert(
-    REP_UUID.test(manifestUuid),
+    manifestUuid === 'new' || REP_UUID.test(manifestUuid),
     `Manifest UUID must be a UUIDv4; got [${manifestUuid}]`,
   );