diff --git a/.changeset/grumpy-chefs-judge.md b/.changeset/grumpy-chefs-judge.md
new file mode 100644
index 000000000..a3a7d22f2
--- /dev/null
+++ b/.changeset/grumpy-chefs-judge.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix issue where hostname was not passed to dev server
diff --git a/packages/astro/src/core/dev/index.ts b/packages/astro/src/core/dev/index.ts
index ae1b57997..c8da25490 100644
--- a/packages/astro/src/core/dev/index.ts
+++ b/packages/astro/src/core/dev/index.ts
@@ -24,7 +24,15 @@ export default async function dev(config: AstroConfig, options: DevOptions = { l
 		exclude: 'window document',
 	});
 	// start the server
-	const viteUserConfig = vite.mergeConfig({ mode: 'development' }, config.vite || {});
+	const viteUserConfig = vite.mergeConfig(
+		{
+			mode: 'development',
+			server: {
+				host: config.devOptions.hostname,
+			},
+		},
+		config.vite || {}
+	);
 	const viteConfig = await createVite(viteUserConfig, { astroConfig: config, logging: options.logging });
 	const viteServer = await vite.createServer(viteConfig);
 	await viteServer.listen(config.devOptions.port);