diff --git a/build.bun.ts b/build.bun.ts
index b537346..7e9ec47 100644
--- a/build.bun.ts
+++ b/build.bun.ts
@@ -7,7 +7,7 @@ await $`tsc`;
 const isDevelopment = Bun.env.NODE_ENV === "development";
 
 // Build all JavaScript/TypeScript files
-function buildJs(entrypoint: string, opts: Record<string, string> = {}) {
+function buildJs(entrypoint: string, opts: Record<string, any> = {}) {
     return Bun.build({
         entrypoints: [entrypoint],
         outdir: "dist",
@@ -22,6 +22,6 @@ function buildJs(entrypoint: string, opts: Record<string, string> = {}) {
 
 await Promise.all([
   buildJs("src/app.ts", { outdir: "dist/src" }),
-  buildJs("src/app-bridge.ts", { outdir: "dist/src" }),
+  buildJs("src/app-bridge.ts", { outdir: "dist/src", external: ["@modelcontextprotocol/sdk"] }),
   buildJs("src/react/index.tsx", { outdir: "dist/src/react" }),
 ])
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