diff --git a/packages/backend/src/core/activitypub/ApRendererService.ts b/packages/backend/src/core/activitypub/ApRendererService.ts
index 91a2767e6..648f30229 100644
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@@ -274,7 +274,7 @@ export class ApRendererService {
 		} as any;
 
 		if (reaction.startsWith(':')) {
-			const name = reaction.replace(/:/g, '');
+			const name = reaction.replaceAll(':', '');
 			const emoji = await this.emojisRepository.findOneBy({
 				name,
 				host: IsNull(),
diff --git a/packages/backend/src/misc/nyaize.ts b/packages/backend/src/misc/nyaize.ts
index 500d1db2c..350f8d217 100644
--- a/packages/backend/src/misc/nyaize.ts
+++ b/packages/backend/src/misc/nyaize.ts
@@ -1,14 +1,14 @@
 export function nyaize(text: string): string {
 	return text
 		// ja-JP
-		.replace(/な/g, 'にゃ').replace(/ナ/g, 'ニャ').replace(/ﾅ/g, 'ﾆｬ')
+		.replaceAll('な', 'にゃ').replaceAll('ナ', 'ニャ').replaceAll('ﾅ', 'ﾆｬ')
 		// en-US
 		.replace(/(?<=n)a/gi, x => x === 'A' ? 'YA' : 'ya')
 		.replace(/(?<=morn)ing/gi, x => x === 'ING' ? 'YAN' : 'yan')
 		.replace(/(?<=every)one/gi, x => x === 'ONE' ? 'NYAN' : 'nyan')
 		// ko-KR
 		.replace(/[나-낳]/g, match => String.fromCharCode(
-			match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0)
+			match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0),
 		))
 		.replace(/(다$)|(다(?=\.))|(다(?= ))|(다(?=!))|(다(?=\?))/gm, '다냥')
 		.replace(/(야(?=\?))|(야$)|(야(?= ))/gm, '냥');