diff --git a/src/ai.ts b/src/ai.ts
index cba940c..8fb599e 100644
--- a/src/ai.ts
+++ b/src/ai.ts
@@ -15,8 +15,8 @@ import getCollection from './utils/get-collection';
 import Stream from './stream';
 import log from './utils/log';
 
-type MentionHook = (msg: Message) => boolean | HandlerResult;
-type ContextHook = (msg: Message, data?: any) => void | HandlerResult;
+type MentionHook = (msg: Message) => Promise<boolean | HandlerResult>;
+type ContextHook = (msg: Message, data?: any) => Promise<void | HandlerResult>;
 
 export type HandlerResult = {
 	reaction: string;
@@ -165,7 +165,7 @@ export default class 藍 {
 		// なければそれぞれのモジュールについてフックが引っかかるまで呼び出し
 		if (context != null) {
 			const handler = this.contextHooks[context.module];
-			const res = handler(msg, context.data);
+			const res = await handler(msg, context.data);
 
 			if (res != null && typeof res === 'object') {
 				reaction = res.reaction;
@@ -173,10 +173,10 @@ export default class 藍 {
 		} else {
 			let res: boolean | HandlerResult;
 
-			this.mentionHooks.some(handler => {
-				res = handler(msg);
-				return res === true || typeof res === 'object';
-			});
+			for (const handler of this.mentionHooks) {
+				res = await handler(msg);
+				if (res === true || typeof res === 'object') break;
+			}
 
 			if (res != null && typeof res === 'object') {
 				reaction = res.reaction;
diff --git a/src/modules/core/index.ts b/src/modules/core/index.ts
index e6dc72d..cb1108d 100644
--- a/src/modules/core/index.ts
+++ b/src/modules/core/index.ts
@@ -21,7 +21,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (!msg.text) return false;
 
 		return (
@@ -313,7 +313,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private contextHook(msg: Message, data: any) {
+	private async contextHook(msg: Message, data: any) {
 		if (msg.text == null) return;
 
 		const done = () => {
diff --git a/src/modules/dice/index.ts b/src/modules/dice/index.ts
index 030ff34..e46e42b 100644
--- a/src/modules/dice/index.ts
+++ b/src/modules/dice/index.ts
@@ -14,7 +14,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.text == null) return false;
 
 		const query = msg.text.match(/([0-9]+)[dD]([0-9]+)/);
diff --git a/src/modules/emoji/index.ts b/src/modules/emoji/index.ts
index edf0785..b56be5c 100644
--- a/src/modules/emoji/index.ts
+++ b/src/modules/emoji/index.ts
@@ -137,7 +137,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.includes(['顔文字', '絵文字', 'emoji', '福笑い'])) {
 			const hand = hands[Math.floor(Math.random() * hands.length)];
 			const face = faces[Math.floor(Math.random() * faces.length)];
diff --git a/src/modules/follow/index.ts b/src/modules/follow/index.ts
index d7e33a3..b6a1b26 100644
--- a/src/modules/follow/index.ts
+++ b/src/modules/follow/index.ts
@@ -13,7 +13,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.text && msg.includes(['フォロー', 'フォロバ', 'follow me'])) {
 			if (!msg.user.isFollowing) {
 				this.ai.api('following/create', {
diff --git a/src/modules/fortune/index.ts b/src/modules/fortune/index.ts
index f3e54f5..dac4c37 100644
--- a/src/modules/fortune/index.ts
+++ b/src/modules/fortune/index.ts
@@ -16,7 +16,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.includes(['占', 'うらな', '運勢', 'おみくじ'])) {
 			const date = new Date();
 			const seed = `${date.getFullYear()}/${date.getMonth()}/${date.getDate()}@${msg.userId}`;
diff --git a/src/modules/guessing-game/index.ts b/src/modules/guessing-game/index.ts
index 0c232fc..bc9e089 100644
--- a/src/modules/guessing-game/index.ts
+++ b/src/modules/guessing-game/index.ts
@@ -32,7 +32,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (!msg.includes(['数当て', '数あて'])) return false;
 
 		const exist = this.guesses.findOne({
@@ -69,7 +69,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private contextHook(msg: Message) {
+	private async contextHook(msg: Message) {
 		if (msg.text == null) return;
 
 		const exist = this.guesses.findOne({
diff --git a/src/modules/ping/index.ts b/src/modules/ping/index.ts
index f09f08f..f8672c6 100644
--- a/src/modules/ping/index.ts
+++ b/src/modules/ping/index.ts
@@ -13,7 +13,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.text && msg.text.includes('ping')) {
 			msg.reply('PONG!');
 			return true;
diff --git a/src/modules/reversi/index.ts b/src/modules/reversi/index.ts
index 12b4544..5b0d62a 100644
--- a/src/modules/reversi/index.ts
+++ b/src/modules/reversi/index.ts
@@ -33,7 +33,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		if (msg.includes(['リバーシ', 'オセロ', 'reversi', 'othello'])) {
 			if (config.reversiEnabled) {
 				msg.reply(serifs.reversi.ok);
diff --git a/src/modules/timer/index.ts b/src/modules/timer/index.ts
index b14d0fb..8f51985 100644
--- a/src/modules/timer/index.ts
+++ b/src/modules/timer/index.ts
@@ -14,7 +14,7 @@ export default class extends Module {
 	}
 
 	@autobind
-	private mentionHook(msg: Message) {
+	private async mentionHook(msg: Message) {
 		const secondsQuery = (msg.text || '').match(/([0-9]+)秒/);
 		const minutesQuery = (msg.text || '').match(/([0-9]+)分/);
 		const hoursQuery = (msg.text || '').match(/([0-9]+)時間/);