diff --git a/.changeset/wet-schools-clap.md b/.changeset/wet-schools-clap.md
new file mode 100644
index 000000000..17cf7c4cc
--- /dev/null
+++ b/.changeset/wet-schools-clap.md
@@ -0,0 +1,5 @@
+---
+"@astrojs/vercel": patch
+---
+
+Fix warning syntax in README
diff --git a/packages/integrations/vercel/README.md b/packages/integrations/vercel/README.md
index d9df152f8..b20131f67 100644
--- a/packages/integrations/vercel/README.md
+++ b/packages/integrations/vercel/README.md
@@ -175,7 +175,8 @@ You can use Vercel middleware to intercept a request and redirect before sending
     ```
 1. While developing locally, you can run `vercel dev` to run middleware. In production, Vercel will handle this for you.
 
-:::caution[Trying to rewrite?] Currently rewriting a request with middleware only works for static files. :::
+> **Warning**
+> **Trying to rewrite?** Currently rewriting a request with middleware only works for static files.
 
 ## Troubleshooting