diff --git a/.gitignore b/.gitignore
index bf77846..3229261 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ node_modules
 .direnv
 .wrangler
 CLAUDE.local.md
+.local
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..512ff90
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+  "js/ts.tsdk.path": "node_modules/typescript/lib"
+}
diff --git a/client/.env.local.sample b/client/.env.local.sample
index b096a7d..0295f4a 100644
--- a/client/.env.local.sample
+++ b/client/.env.local.sample
@@ -1,2 +1,3 @@
 VITE_API_ENDPOINT=http://localhost:3000
 VITE_FRONTEND_ORIGIN=http://localhost:5173
+VITE_ALLOWED_HOSTS=
diff --git a/client/src/pages/eventId/Submission.tsx b/client/src/pages/eventId/Submission.tsx
index 1ae3adb..ac5203f 100644
--- a/client/src/pages/eventId/Submission.tsx
+++ b/client/src/pages/eventId/Submission.tsx
@@ -455,7 +455,7 @@ export default function SubmissionPage() {
                             <span className="sm:hidden">日程変更</span>
                           </>
                         ) : (
-                          <span>提出する</span>
+                          <span>入力する</span>
                         )}
                       </button>
                     </div>
diff --git a/client/vite.config.ts b/client/vite.config.ts
index 144359a..362f482 100644
--- a/client/vite.config.ts
+++ b/client/vite.config.ts
@@ -1,8 +1,14 @@
 import tailwindcss from "@tailwindcss/vite";
 import react from "@vitejs/plugin-react";
-import { defineConfig } from "vite";
+import { defineConfig, loadEnv } from "vite";
 
 // https://vite.dev/config/
-export default defineConfig({
-  plugins: [react(), tailwindcss()],
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), "");
+  return {
+    plugins: [react(), tailwindcss()],
+    server: {
+      allowedHosts: env.VITE_ALLOWED_HOSTS?.split(",").filter(Boolean) ?? [],
+    },
+  };
 });
diff --git a/compose.yml b/compose.yml
index 20f8f4a..5b3f8bb 100644
--- a/compose.yml
+++ b/compose.yml
@@ -7,7 +7,7 @@ services:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: password
     ports:
-      - "5432:5432"
+      - "127.0.0.1:5432:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data