diff --git a/src/webapp/server.ts b/src/webapp/server.ts
index dabe7f1..bd12792 100644
--- a/src/webapp/server.ts
+++ b/src/webapp/server.ts
@@ -59,7 +59,7 @@ async function startApp(name: string): Promise<string | undefined> {
     const port = String(nextPort++)
     const proc = Bun.spawn({
         cmd: [BUN_BIN, "run", "src/webapp/worker.ts", name],
-        env: { PORT: port },
+        env: { ...process.env, PORT: String(port) },
         stdout: "inherit",
         stderr: "inherit",
     })