diff --git a/apps/server/src/index.ts b/apps/server/src/index.ts
index 526da54..77f2750 100644
--- a/apps/server/src/index.ts
+++ b/apps/server/src/index.ts
@@ -1,33 +1,13 @@
-import { createServer } from "http";
-import { GameManager } from "./domains/game/GameManager";
-import { RoomManager } from "./domains/room/RoomManager";
-import { SocketManager } from "./network/SocketManager";
-import { createIo } from "./network/createIo";
+import { createHttpServer } from "./network/bootstrap/createHttpServer";
+import { boot } from "./network/bootstrap/boot";
 import { config } from "@repo/shared";
 
 // サーバー待受ポート
 const PORT = process.env.PORT || config.NETWORK_CONFIG.DEV_SERVER_PORT;
 
 // HTTP サーバー・Socket.io サーバー生成
-const httpServer = createServer((req, res) => {
-  // Render の HTTP ヘルスチェック向けに 200 を返す
-  if (req.url === "/") {
-    res.writeHead(200, { "Content-Type": "text/plain; charset=utf-8" });
-    res.end("ok");
-    return;
-  }
-
-  res.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
-  res.end("not found");
-});
-const io = createIo(httpServer);
-
-// ゲーム管理・通信管理クラス初期化
-const gameManager = new GameManager();
-const roomManager = new RoomManager();
-const socketManager = new SocketManager(io, gameManager, roomManager);
-
-socketManager.initialize();
+const httpServer = createHttpServer();
+boot(httpServer);
 
 // HTTP サーバー起動
 httpServer.listen(PORT, () => {
diff --git a/apps/server/src/network/bootstrap/boot.ts b/apps/server/src/network/bootstrap/boot.ts
new file mode 100644
index 0000000..004c870
--- /dev/null
+++ b/apps/server/src/network/bootstrap/boot.ts
@@ -0,0 +1,14 @@
+import type { Server as HttpServer } from "http";
+import { GameManager } from "@server/domains/game/GameManager";
+import { RoomManager } from "@server/domains/room/RoomManager";
+import { SocketManager } from "../SocketManager";
+import { createIo } from "./createIo";
+
+export const boot = (httpServer: HttpServer) => {
+  const io = createIo(httpServer);
+  const gameManager = new GameManager();
+  const roomManager = new RoomManager();
+  const socketManager = new SocketManager(io, gameManager, roomManager);
+
+  socketManager.initialize();
+};
diff --git a/apps/server/src/network/bootstrap/createHttpServer.ts b/apps/server/src/network/bootstrap/createHttpServer.ts
new file mode 100644
index 0000000..3434920
--- /dev/null
+++ b/apps/server/src/network/bootstrap/createHttpServer.ts
@@ -0,0 +1,14 @@
+import { createServer } from "http";
+
+export const createHttpServer = () => {
+  return createServer((req, res) => {
+    if (req.url === "/") {
+      res.writeHead(200, { "Content-Type": "text/plain; charset=utf-8" });
+      res.end("ok");
+      return;
+    }
+
+    res.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
+    res.end("not found");
+  });
+};
diff --git a/apps/server/src/network/bootstrap/createIo.ts b/apps/server/src/network/bootstrap/createIo.ts
new file mode 100644
index 0000000..e77fb86
--- /dev/null
+++ b/apps/server/src/network/bootstrap/createIo.ts
@@ -0,0 +1,12 @@
+import { Server } from "socket.io";
+import { config } from "@repo/shared";
+import type { Server as HttpServer } from "http";
+
+export const createIo = (httpServer: HttpServer) => {
+  return new Server(httpServer, {
+    cors: {
+      origin: config.NETWORK_CONFIG.CORS_ORIGIN,
+      methods: [...config.NETWORK_CONFIG.CORS_METHODS],
+    },
+  });
+};