diff --git a/server/server.test.ts b/server/server.test.ts
index 16166f8..3df4845 100644
--- a/server/server.test.ts
+++ b/server/server.test.ts
@@ -1,6 +1,5 @@
 import { assertEquals } from "$std/assert/assert_equals.ts";
 import { assertStringIncludes } from "$std/assert/assert_string_includes.ts";
-import { assertThrows } from "$std/assert/assert_throws.ts";
 import { join } from "$std/path/join.ts";
 import { respond } from "./server.ts";
 
@@ -65,13 +64,9 @@ Deno.test(
     await res.body?.cancel();
 
     assertEquals(res.status, 200);
-    assertThrows(() =>
-      assertStringIncludes(
-        res.headers.get("Content-Type") ?? "",
-        // Currently, the .pkg file isn't served with the correct content type.
-        // However, this isn't a big deal, so I'm ignoring the failure.
-        "application/octet-stream",
-      ),
+    assertStringIncludes(
+      res.headers.get("Content-Type") ?? "",
+      "application/octet-stream",
     );
   },
 );
diff --git a/server/server.ts b/server/server.ts
index 43f48ac..dda4069 100644
--- a/server/server.ts
+++ b/server/server.ts
@@ -1,19 +1,19 @@
 import { serveDir } from "$std/http/file_server.ts";
 
-function serve(): void {
-  Deno.serve(async (req: Request): Promise<Response> => await respond(req));
-}
-
-const headers = [
-  "Cross-Origin-Opener-Policy: same-origin",
-  "Cross-Origin-Embedder-Policy: require-corp",
-];
-
 export async function respond(req: Request, dir = "build"): Promise<Response> {
-  return await serveDir(req, {
+  const path = new URL(req.url).pathname;
+  const res = await serveDir(req, {
     fsRoot: dir,
-    headers: headers,
+    enableCors: true,
   });
+
+  res.headers.set("Cross-Origin-Opener-Policy", "same-origin");
+  res.headers.set("Cross-Origin-Embedder-Policy", " require-corp");
+  if (path.endsWith(".pck")) {
+    res.headers.set("Content-Type", "application/octet-stream");
+  }
+
+  return res;
 }
 
-serve();
+Deno.serve(async (req: Request): Promise<Response> => await respond(req));