diff --git a/.changeset/stale-carpets-repair.md b/.changeset/stale-carpets-repair.md
new file mode 100644
index 00000000..8ca319e9
--- /dev/null
+++ b/.changeset/stale-carpets-repair.md
@@ -0,0 +1,5 @@
+---
+"vinxi": patch
+---
+
+externalize h3 from vite builds so its only included once in the final server build
diff --git a/packages/vinxi/lib/build.js b/packages/vinxi/lib/build.js
index e1bb2e10..4c67dda9 100644
--- a/packages/vinxi/lib/build.js
+++ b/packages/vinxi/lib/build.js
@@ -294,6 +294,7 @@ async function createRouterBuild(app, router) {
 				ssrManifest: true,
 				rollupOptions: {
 					input: { handler: router.handler },
+					external: ["h3"],
 				},
 				target: "esnext",
 				outDir: join(router.build.outDir + "_entry"),
@@ -399,6 +400,11 @@ const routerModePlugin = {
 			ssr: {
 				noExternal: ["vinxi"],
 			},
+			build: {
+				rollupOptions: {
+					external: ["h3"],
+				},
+			},
 			optimizeDeps: {
 				force: true,
 				exclude: ["vinxi"],
@@ -414,6 +420,11 @@ const routerModePlugin = {
 			ssr: {
 				noExternal: ["vinxi"],
 			},
+			build: {
+				rollupOptions: {
+					external: ["h3"],
+				},
+			},
 			optimizeDeps: {
 				disabled: true,
 			},
@@ -429,6 +440,11 @@ const routerModePlugin = {
 			ssr: {
 				noExternal: ["vinxi"],
 			},
+			build: {
+				rollupOptions: {
+					external: ["h3"],
+				},
+			},
 			optimizeDeps: {
 				force: true,
 				exclude: ["vinxi"],
diff --git a/packages/vinxi/vinxi.d.ts b/packages/vinxi/vinxi.d.ts
index 03a0d0cd..70aeefa3 100644
--- a/packages/vinxi/vinxi.d.ts
+++ b/packages/vinxi/vinxi.d.ts
@@ -208,12 +208,12 @@ export type RouterMode<T extends RouterConfig["mode"]> = {
 type CreateApp = <
 	T extends BundlerConfig,
 	R extends RouterConfig<T> = RouterConfig<T>,
->(config: {
+>(config?: {
 	bundlers?: T[];
 	routers: R[];
 }) => App<T, R>;
 
-export { createApp } from "./lib/app";
+export const createApp: CreateApp;
 
 export type { ViteDevServer as DevServer } from "vite";