diff --git a/packages/codius-astro/src/lib/github.ts b/packages/codius-astro/src/lib/github.ts
index e319eef..289a79d 100644
--- a/packages/codius-astro/src/lib/github.ts
+++ b/packages/codius-astro/src/lib/github.ts
@@ -60,7 +60,7 @@ export const triggerWorkflow = async (
     workflow_id: "deploy-worker.yml",
     owner: "codius",
     repo: "codius-astro",
-    ref: "main",
+    ref: "preview",
     inputs: {
       appId,
       repo: `${owner}/${repo}`,