diff --git a/workspaces/netlify-cms-auth/src/callback.ts b/workspaces/netlify-cms-auth/src/callback.ts
index c942792705..d0f924946e 100644
--- a/workspaces/netlify-cms-auth/src/callback.ts
+++ b/workspaces/netlify-cms-auth/src/callback.ts
@@ -62,7 +62,7 @@ function postMessageHTML({ status, data }: PostMessageHTMLArgs) {
         const allowedOrigin = (
           message.origin === 'http://localhost:1234' ||
           message.origin === 'http://127.0.0.1:1234' ||
-          message.origin === 'https://netlify-cms-auth.haim-6b2.workers.dev/' ||
+          message.origin === 'https://netlify-cms-auth.haim-6b2.workers.dev' ||
           /^https:\\/\\/[-_\\w]+\\.starknet-netlify-cms\\.pages\\.dev$/.test(message.origin)
         );