diff --git a/src/api/http-error.ts b/src/api/http-error.ts
index 509c1df..6e6e637 100644
--- a/src/api/http-error.ts
+++ b/src/api/http-error.ts
@@ -12,10 +12,17 @@ export class HttpError implements Error {
     return (
       content ===
         '{"message":"Testing Apikey is only allowed to ticker ending with \\"01\\""}' ||
-      content === '{"message":"Testing apikey is not allowed"}'
+      content === '{"message":"Testing apikey is not allowed"}' ||
+      content ===
+        '{"message":"Trial request only supports ticker ending \'01\'"}'
     )
   }
 
+  public isInvalidTokenRequest(): boolean {
+    const content = this.response.getContentText()
+    return content === '{"message":"Forbidden"}'
+  }
+
   public toString(): string {
     return this.message
   }
diff --git a/src/custom-functions/v2/bcode.ts b/src/custom-functions/v2/bcode.ts
index 7b320dd..b91fd9a 100644
--- a/src/custom-functions/v2/bcode.ts
+++ b/src/custom-functions/v2/bcode.ts
@@ -95,8 +95,10 @@ export function bcode(
 
       if (e.isInvalidTestingRequest()) {
         throw new Error('<<テスト用のAPIキーでは取得できないデータです>>')
-      } else if (code === 403) {
+      } else if (e.isInvalidTokenRequest()) {
         throw new Error('<<APIキーが有効ではありません>>')
+      } else if (code === 403) {
+        throw new Error('<<月間リクエスト制限に達しています>>')
       } else if (code === 429) {
         throw new Error('<<APIの実行回数が上限に達しました>>')
       } else if (Math.floor(code / 100) === 4) {