diff --git a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/GameLoginHandler.java b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/GameLoginHandler.java
index 98cdeaf8..41c19364 100644
--- a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/GameLoginHandler.java
+++ b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/GameLoginHandler.java
@@ -4,7 +4,6 @@ import com.fasterxml.jackson.core.JsonProcessingException;
 import icu.samnyan.aqua.sega.general.BaseHandler;
 import icu.samnyan.aqua.sega.chusan.model.gamedata.GameLoginBonus;
 import icu.samnyan.aqua.sega.chusan.model.gamedata.GameLoginBonusPreset;
-import icu.samnyan.aqua.sega.chusan.model.response.CodeResp;
 import icu.samnyan.aqua.sega.chusan.model.userdata.Chu3UserData;
 import icu.samnyan.aqua.sega.chusan.model.userdata.UserItem;
 import icu.samnyan.aqua.sega.chusan.model.userdata.UserLoginBonus;
@@ -138,8 +137,6 @@ public class GameLoginHandler implements BaseHandler {
             }
         }
 
-        String json = mapper.write(new CodeResp(1));
-        logger.info("Response: " + json);
-        return json;
+        return "{\"returnCode\":\"1\"}";
     }
 }
diff --git a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/UpsertUserChargelogHandler.java b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/UpsertUserChargelogHandler.java
index 8a9ec4f9..e23d8d2c 100644
--- a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/UpsertUserChargelogHandler.java
+++ b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/UpsertUserChargelogHandler.java
@@ -2,7 +2,6 @@ package icu.samnyan.aqua.sega.chusan.handler;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import icu.samnyan.aqua.sega.general.BaseHandler;
-import icu.samnyan.aqua.sega.chusan.model.response.CodeResp;
 import icu.samnyan.aqua.sega.chusan.model.userdata.UserCharge;
 import icu.samnyan.aqua.sega.chusan.model.userdata.Chu3UserData;
 import icu.samnyan.aqua.sega.chusan.service.UserChargeService;
@@ -53,8 +52,6 @@ public class UpsertUserChargelogHandler implements BaseHandler {
 
         userChargeService.save(userCharge);
 
-        String json = mapper.write(new CodeResp(1));
-        logger.info("Response: " + json);
-        return json;
+        return "{\"returnCode\":\"1\"}";
     }
 }
diff --git a/src/main/java/icu/samnyan/aqua/sega/chusan/model/response/CodeResp.java b/src/main/java/icu/samnyan/aqua/sega/chusan/model/response/CodeResp.java
deleted file mode 100644
index 4cb4923e..00000000
--- a/src/main/java/icu/samnyan/aqua/sega/chusan/model/response/CodeResp.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package icu.samnyan.aqua.sega.chusan.model.response;
-
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-/**
- * @author samnyan (privateamusement@protonmail.com)
- */
-@Data
-@AllArgsConstructor
-@NoArgsConstructor
-public class CodeResp {
-    private int returnCode;
-}