diff --git a/e2e/svelte.config.js b/e2e/svelte.config.js
index d0ce7b1e..ffdf30f8 100644
--- a/e2e/svelte.config.js
+++ b/e2e/svelte.config.js
@@ -2,4 +2,9 @@ import { vitePreprocess } from '@astrojs/svelte'
 
 export default {
   preprocess: vitePreprocess(),
+  compilerOptions: {
+    experimental: {
+      async: true,
+    },
+  },
 }
diff --git a/examples/svelte/svelte.config.js b/examples/svelte/svelte.config.js
index 1a204af1..38e93e9a 100644
--- a/examples/svelte/svelte.config.js
+++ b/examples/svelte/svelte.config.js
@@ -15,6 +15,12 @@ const config = {
     // See https://svelte.dev/docs/kit/adapters for more information about adapters.
     adapter: adapter(),
   },
+
+  compilerOptions: {
+    experimental: {
+      async: true,
+    },
+  },
 }
 
 export default config