diff --git a/package.json b/package.json
index bc440fe..fd82edf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "earthquake-bot-for-mtweet",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "type": "module",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/earthquake/index.ts b/src/earthquake/index.ts
index b627c00..b9d5e74 100644
--- a/src/earthquake/index.ts
+++ b/src/earthquake/index.ts
@@ -170,10 +170,10 @@ const processMessage = async (message: any) => {
             : [`🪨深さ: ${message.earthquake.hypocenter.depth === 0
               ? "ごく浅い"
               : `${message.earthquake.hypocenter.depth}km`}`]));
-          earthquakeNoticeText.push(...(message.earthquake.domesticTsunami ?? "Unknown" === "Unknown"
+          earthquakeNoticeText.push(...((message.earthquake.domesticTsunami ?? "Unknown") === "Unknown"
             ? []
             : [domesticTsunamiMessages[(message.earthquake.domesticTsunami)]]));
-          earthquakeNoticeText.push(...(message.earthquake.foreignTsunami ?? "Unknown" === "Unknown"
+          earthquakeNoticeText.push(...((message.earthquake.foreignTsunami ?? "Unknown") === "Unknown"
             ? []
             : [foreignTsunamiMessages[(message.earthquake.foreignTsunami)]]));
           earthquakeNoticeText.push(...(pointsMsg === ""