diff --git a/lib/bot.js b/lib/bot.js
index 41b48e03..df586fcb 100644
--- a/lib/bot.js
+++ b/lib/bot.js
@@ -254,6 +254,8 @@ export default class Yunzai extends EventEmitter {
         case "function":
           return String(value)
         case "object":
+          if (value instanceof Map || value instanceof Set)
+            return Array.from(value)
           if (value !== null) break
         default:
           return value