diff --git a/.eslintrc.json b/.eslintrc.json
index 6231a7d4..3068c820 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -9,7 +9,8 @@
   "plugins": ["@typescript-eslint", "import"],
   "parserOptions": {
     "sourceType": "module",
-    "ecmaVersion": "latest"
+    "ecmaVersion": "latest",
+    "project": true
   },
   "env": {
     "node": true
@@ -21,6 +22,8 @@
         "alphabetize": { "order": "asc" },
         "newlines-between": "never"
       }
-    ]
+    ],
+    "@typescript-eslint/restrict-template-expressions": "off",
+    "@typescript-eslint/no-base-to-string": "off"
   }
 }
diff --git a/src/commands/join.ts b/src/commands/join.ts
index 40ef890e..a0122eb7 100644
--- a/src/commands/join.ts
+++ b/src/commands/join.ts
@@ -1,3 +1,4 @@
+import { once } from "events";
 import {
   ApplicationCommandOptionType,
   type ChatInputCommandInteraction,
@@ -6,7 +7,6 @@ import {
 } from "discord.js";
 import { ReplyableError } from "../error";
 import Pipeline from "../pipeline";
-import { VoiceConnectionStatus, entersState } from "@discordjs/voice";
 
 export const definition = {
   name: "join",
@@ -38,9 +38,6 @@ export async function handler(
     );
   }
   const pipeline = new Pipeline(channel);
-  await Promise.all([
-    interaction.deferReply(),
-    entersState(pipeline.connection, VoiceConnectionStatus.Ready, 10_000),
-  ]);
+  await Promise.all([interaction.deferReply(), once(pipeline, "ready")]);
   await interaction.editReply(`${channel}に参加しました。`);
 }
diff --git a/src/main.ts b/src/main.ts
index a2be269e..7da30320 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,7 +1,7 @@
 import { Client, Events, GatewayIntentBits } from "discord.js";
-import { ReplyableError } from "./error";
 import * as join from "./commands/join";
 import * as leave from "./commands/leave";
+import { ReplyableError } from "./error";
 
 const client = new Client({
   intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMessages],
@@ -25,4 +25,4 @@ client.on(Events.InteractionCreate, async (interaction) => {
   }
 });
 
-client.login();
+void client.login();