diff --git a/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/AccountController.java b/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/AccountController.java
index e4dff46..256660d 100644
--- a/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/AccountController.java
+++ b/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/AccountController.java
@@ -1,5 +1,8 @@
 package com.techsor.datacenter.business.controller;
 
+import cn.hutool.captcha.CaptchaUtil;
+import cn.hutool.captcha.LineCaptcha;
+import com.techsor.datacenter.business.service.captcha.HutoolCaptchaGenerator;
 import io.swagger.v3.oas.annotations.media.Schema;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
@@ -9,7 +12,6 @@ import org.apache.commons.codec.binary.Base64;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
-import com.google.code.kaptcha.impl.DefaultKaptcha;
 import com.techsor.datacenter.business.common.response.SimpleDataResponse;
 import com.techsor.datacenter.business.configurator.interceptor.AccessRequired;
 import com.techsor.datacenter.business.dto.account.CacheUserData;
@@ -19,6 +21,7 @@ import com.techsor.datacenter.business.service.AccountService;
 import com.techsor.datacenter.business.service.captcha.CaptchaService;
 import com.techsor.datacenter.business.service.captcha.CaptchaVO;
 
+import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -39,8 +42,6 @@ public class AccountController {
 	
     @Autowired
     private AccountService accountService;
-    @Autowired
-    private DefaultKaptcha producer;
 	@Autowired
     private CaptchaService captchaService;
 
@@ -52,7 +53,6 @@ public class AccountController {
      * @param LanguageType  the language type (0: Chinese, 1: English, 2: Japanese)
      * @param request       the HttpServletRequest object
      * @param response      the HttpServletResponse object
-     * @param device        the device object
      * @return a SimpleDataResponse containing the cached user data
      */
 	@Operation(summary = "User Login")
@@ -174,15 +174,16 @@ public class AccountController {
     @Operation(summary = "Retrieve Login Captcha")
     @RequestMapping(value = "/getCaptcha", method = RequestMethod.GET)
     public SimpleDataResponse<CaptchaVO> getCaptcha() throws IOException {
-        // Generate text captcha
-        String content = producer.createText();
-        // Generate image captcha
-        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-        BufferedImage image = producer.createImage(content);
-        ImageIO.write(image, "jpg", outputStream);
+        // 使用 Hutool 创建一个验证码
+        LineCaptcha captcha = CaptchaUtil.createLineCaptcha(110, 40, 4, 5);
+        captcha.setFont(new Font("微软雅黑", Font.BOLD, 32));
+        captcha.setGenerator(new HutoolCaptchaGenerator());
+        // 重新生成验证码内容（因为 setGenerator() 之后要刷新）
+        captcha.createCode();
+        String content = captcha.getCode();  // 获取验证码文本
         // Encode byte array to Base64
         String str = "data:image/jpeg;base64,";
-        String base64Img = str + Base64.encodeBase64String(outputStream.toByteArray())
+        String base64Img = str + captcha.getImageBase64()
                 .replace("\n", "")
                 .replace("\r", "");
         // Cache captcha and prepare response
diff --git a/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/OpenApiController.java b/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/OpenApiController.java
index 4bb1916..e24dc61 100644
--- a/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/OpenApiController.java
+++ b/data-center-business-controller/src/main/java/com/techsor/datacenter/business/controller/OpenApiController.java
@@ -1,32 +1,17 @@
 package com.techsor.datacenter.business.controller;
 
 
-import com.google.code.kaptcha.impl.DefaultKaptcha;
 import com.techsor.datacenter.business.common.response.SimpleDataResponse;
-import com.techsor.datacenter.business.configurator.interceptor.AccessRequired;
-import com.techsor.datacenter.business.dao.ex.CompanyMapperExt;
 import com.techsor.datacenter.business.dto.account.CacheUserData;
-import com.techsor.datacenter.business.dto.account.LoginParam;
-import com.techsor.datacenter.business.dto.device.alert.DeviceAlertConfigNextParams;
 import com.techsor.datacenter.business.dto.openapi.OpenApiAddMultiAlarmParams;
-import com.techsor.datacenter.business.service.AccountService;
-import com.techsor.datacenter.business.service.captcha.CaptchaService;
-import com.techsor.datacenter.business.service.captcha.CaptchaVO;
 import com.techsor.datacenter.business.service.impl.OpenApiServiceImpl;
 import io.swagger.v3.oas.annotations.media.Schema;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
-import org.apache.commons.codec.binary.Base64;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
-import javax.imageio.ImageIO;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.awt.image.BufferedImage;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
 import java.util.List;
 
 /**
diff --git a/data-center-business-service/pom.xml b/data-center-business-service/pom.xml
index b42f679..6c6fbb1 100644
--- a/data-center-business-service/pom.xml
+++ b/data-center-business-service/pom.xml
@@ -56,11 +56,12 @@
               <artifactId>s3</artifactId>
           </dependency>
 
-    <dependency>
-		  <groupId>com.github.penggle</groupId>
-		  <artifactId>kaptcha</artifactId>
-		  <version>2.3.2</version>
-	</dependency>
+      <!-- https://mvnrepository.com/artifact/cn.hutool/hutool-captcha -->
+      <dependency>
+          <groupId>cn.hutool</groupId>
+          <artifactId>hutool-captcha</artifactId>
+          <version>5.8.41</version>
+      </dependency>
       <dependency>
           <groupId>org.junit.vintage</groupId>
           <artifactId>junit-vintage-engine</artifactId>
diff --git a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/OpenApiService.java b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/OpenApiService.java
index cd52f80..dcc19fe 100644
--- a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/OpenApiService.java
+++ b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/OpenApiService.java
@@ -1,15 +1,8 @@
 package com.techsor.datacenter.business.service;
 
-import com.alibaba.fastjson.JSONObject;
 import com.techsor.datacenter.business.common.response.SimpleDataResponse;
-import com.techsor.datacenter.business.dto.account.LoginParam;
-import com.techsor.datacenter.business.dto.device.alert.DeviceAlertConfigNextParams;
 import com.techsor.datacenter.business.dto.openapi.OpenApiAddMultiAlarmParams;
-import com.techsor.datacenter.business.model.DeviceAlertConfig;
-import com.techsor.datacenter.business.model.DeviceInfo;
 
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 import java.util.List;
 
 /**
diff --git a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/HutoolCaptchaGenerator.java b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/HutoolCaptchaGenerator.java
new file mode 100644
index 0000000..a96ff54
--- /dev/null
+++ b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/HutoolCaptchaGenerator.java
@@ -0,0 +1,27 @@
+package com.techsor.datacenter.business.service.captcha;
+
+import cn.hutool.captcha.generator.CodeGenerator;
+
+public class HutoolCaptchaGenerator implements CodeGenerator {
+
+    private int length = 4;
+    private static final String chars = "23456789abcdefghkmnpqrstuvwxyzABCDEFGHKMNPRSTUVWXYZ";
+
+    @Override
+    public String generate() {
+        StringBuilder sb = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
+            int idx = (int) (Math.random() * chars.length());
+            sb.append(chars.charAt(idx));
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public boolean verify(String code, String userInput) {
+        if (code == null || userInput == null) {
+            return false;
+        }
+        return code.equalsIgnoreCase(userInput);
+    }
+}
\ No newline at end of file
diff --git a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/KaptchaConfig.java b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/KaptchaConfig.java
deleted file mode 100644
index 91e8595..0000000
--- a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/captcha/KaptchaConfig.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package com.techsor.datacenter.business.service.captcha;
-
-import java.util.Properties;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-import com.google.code.kaptcha.impl.DefaultKaptcha;
-import com.google.code.kaptcha.util.Config;
-
-@Configuration
-public class KaptchaConfig {
-    @Bean
-    public DefaultKaptcha producer(){
-
-        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
-        Properties properties = new Properties();
-        properties.setProperty("kaptcha.border", "no");
-        properties.setProperty("kaptcha.border.color", "105,179,90");
-        properties.setProperty("kaptcha.textproducer.font.color", "black");
-        properties.setProperty("kaptcha.image.width", "110");
-        properties.setProperty("kaptcha.image.height", "40");
-        properties.setProperty("kaptcha.textproducer.char.string","23456789abcdefghkmnpqrstuvwxyzABCDEFGHKMNPRSTUVWXYZ");
-        properties.setProperty("kaptcha.textproducer.font.size", "30");
-        properties.setProperty("kaptcha.textproducer.char.space","3");
-        properties.setProperty("kaptcha.session.key", "code");
-        properties.setProperty("kaptcha.textproducer.char.length", "4");
-        properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
-//        properties.setProperty("kaptcha.obscurificator.impl","com.xxx");可以重写实现类
-        properties.setProperty("kaptcha.noise.impl","com.google.code.kaptcha.impl.NoNoise");
-        Config config = new Config(properties);
-        defaultKaptcha.setConfig(config);
-
-        return defaultKaptcha;
-    }
-}
\ No newline at end of file
diff --git a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/GatewayClientsServiceImpl.java b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/GatewayClientsServiceImpl.java
index 46f190b..a538a9f 100644
--- a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/GatewayClientsServiceImpl.java
+++ b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/GatewayClientsServiceImpl.java
@@ -46,7 +46,6 @@ import org.springframework.transaction.interceptor.TransactionAspectSupport;
 import org.springframework.util.ObjectUtils;
 
 import jakarta.annotation.Resource;
-import javax.servlet.http.HttpServletResponse;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
diff --git a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/OpenApiServiceImpl.java b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/OpenApiServiceImpl.java
index 494d8b4..387864f 100644
--- a/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/OpenApiServiceImpl.java
+++ b/data-center-business-service/src/main/java/com/techsor/datacenter/business/service/impl/OpenApiServiceImpl.java
@@ -1,40 +1,20 @@
 package com.techsor.datacenter.business.service.impl;
 
-import com.alibaba.fastjson.JSON;
-import com.alibaba.fastjson.JSONObject;
-import com.alibaba.fastjson.TypeReference;
-import com.techsor.datacenter.business.common.Constants;
-import com.techsor.datacenter.business.common.exception.MsgCodeException;
 import com.techsor.datacenter.business.common.language.msg.MsgLanguageChange;
-import com.techsor.datacenter.business.common.language.msg.Msg_JP;
 import com.techsor.datacenter.business.common.response.ResponseCode;
 import com.techsor.datacenter.business.common.response.SimpleDataResponse;
 import com.techsor.datacenter.business.dao.ex.*;
-import com.techsor.datacenter.business.dto.account.CacheUserData;
-import com.techsor.datacenter.business.dto.account.LoginParam;
-import com.techsor.datacenter.business.dto.device.DeviceTemplateParams;
 import com.techsor.datacenter.business.dto.device.alert.DeviceAlertConfigNextParams;
 import com.techsor.datacenter.business.dto.openapi.OpenApiAddMultiAlarmParams;
 import com.techsor.datacenter.business.model.*;
-import com.techsor.datacenter.business.service.AccountService;
 import com.techsor.datacenter.business.service.OpenApiService;
-import com.techsor.datacenter.business.util.*;
-import com.techsor.datacenter.business.util.redis.RedisUtil;
-import org.apache.commons.collections.CollectionUtils;
-import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.text.MessageFormat;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 /**
  * 开放接口ServiceImpl
diff --git a/pom.xml b/pom.xml
index 8bf07df..6be9c20 100644
--- a/pom.xml
+++ b/pom.xml
@@ -153,7 +153,7 @@
 		 <dependency>
 		    <groupId>org.springdoc</groupId>
 		    <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
-		    <version>2.5.0</version>
+		    <version>2.8.14</version>
 		 </dependency>