diff --git a/pom.xml b/pom.xml
index b2d0fba0..9960b04f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
         <jib-spring-boot-extension-maven.version>0.1.0</jib-spring-boot-extension-maven.version>
         <maven-pmd-plugin.version>3.14.0</maven-pmd-plugin.version>
         <p3c-pmd.version>2.1.1</p3c-pmd.version>
-        <spring-cloud.version>2020.0.3</spring-cloud.version>
+        <spring-cloud.version>2020.0.4</spring-cloud.version>
         <spring-content.version>1.0.0.M5</spring-content.version>
         <spring-boot-admin-starter-server.version>2.5.1</spring-boot-admin-starter-server.version>
         <spring-boot-admin-starter-client.version>2.5.1</spring-boot-admin-starter-client.version>
@@ -80,7 +80,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.4.6</version>
+        <version>2.5.5</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/MafAutoConfiguration.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/MafAutoConfiguration.java
index 0d1977c3..9032a621 100644
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/MafAutoConfiguration.java
+++ b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/MafAutoConfiguration.java
@@ -20,7 +20,6 @@
 import com.jmsoftware.maf.springcloudstarter.redis.RedisConfiguration;
 import com.jmsoftware.maf.springcloudstarter.service.CommonService;
 import com.jmsoftware.maf.springcloudstarter.service.impl.CommonServiceImpl;
-import com.jmsoftware.maf.springcloudstarter.sftp.SftpConfiguration;
 import com.jmsoftware.maf.springcloudstarter.websocket.WebSocketConfiguration;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.ibatis.exceptions.PersistenceException;
@@ -61,7 +60,6 @@
         MyBatisPlusConfiguration.class,
         RedisConfiguration.class,
         Swagger2Configuration.class,
-        SftpConfiguration.class,
         WebSecurityConfiguration.class,
         RestTemplateConfiguration.class,
         AsyncConfiguration.class,
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpClientConfiguration.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpClientConfiguration.java
deleted file mode 100644
index 15150203..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpClientConfiguration.java
+++ /dev/null
@@ -1,72 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import lombok.Data;
-import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.core.io.Resource;
-import org.springframework.validation.annotation.Validated;
-
-import javax.validation.constraints.NotBlank;
-import javax.validation.constraints.NotNull;
-
-/**
- * <h1>SftpClientConfiguration</h1>
- * <p>SFTP client configuration</p>
- *
- * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com
- * @date 2019-07-04 18:18
- **/
-@Data
-@Validated
-@ConfigurationProperties(prefix = SftpClientConfiguration.PREFIX)
-public class SftpClientConfiguration {
-    /**
-     * The constant PREFIX.
-     */
-    public static final String PREFIX = "sftp";
-    /**
-     * The Enabled.
-     */
-    @NotNull
-    private Boolean enabled = Boolean.FALSE;
-    /**
-     * SFTP server IP
-     */
-    @NotBlank
-    private String host;
-    /**
-     * SFTP server port
-     */
-    @NotNull
-    private Integer port;
-    /**
-     * Login user
-     */
-    @NotBlank
-    private String user;
-    /**
-     * Login password
-     */
-    @NotBlank
-    private String password;
-    /**
-     * Remote directory
-     */
-    @NotBlank
-    private String directory;
-    /**
-     * Private key
-     */
-    private Resource privateKey;
-    /**
-     * Private key pass phrase
-     */
-    private String privateKeyPassPhrase;
-    /**
-     * The maximum cache size of session. Default: 10
-     */
-    private Integer sessionCacheSize = 10;
-    /**
-     * The session wait timeout (time unit: MILLISECONDS). Default: 10 * 1000L (10 seconds)
-     */
-    private Long sessionWaitTimeout = 10 * 1000L;
-}
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpConfiguration.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpConfiguration.java
deleted file mode 100644
index cd283ecb..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpConfiguration.java
+++ /dev/null
@@ -1,94 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import com.jcraft.jsch.ChannelSftp;
-import lombok.extern.slf4j.Slf4j;
-import lombok.val;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Import;
-import org.springframework.expression.common.LiteralExpression;
-import org.springframework.integration.annotation.ServiceActivator;
-import org.springframework.integration.file.remote.session.CachingSessionFactory;
-import org.springframework.integration.file.remote.session.SessionFactory;
-import org.springframework.integration.sftp.outbound.SftpMessageHandler;
-import org.springframework.integration.sftp.session.DefaultSftpSessionFactory;
-import org.springframework.integration.sftp.session.SftpRemoteFileTemplate;
-import org.springframework.messaging.MessageHandler;
-
-import java.io.File;
-
-/**
- * Description: SftpConfiguration, change description here.
- *
- * @author 钟俊（zhongjun）, email: zhongjun@toguide.cn, date: 1/29/2021 2:09 PM
- **/
-@Slf4j
-@Import({
-        SftpClientConfiguration.class
-})
-@ConditionalOnProperty({"sftp.enabled"})
-public class SftpConfiguration {
-    @Bean
-    public SessionFactory<ChannelSftp.LsEntry> sftpSessionFactory(SftpClientConfiguration sftpClientConfiguration) {
-        val factory = new DefaultSftpSessionFactory(true);
-        factory.setHost(sftpClientConfiguration.getHost());
-        factory.setPort(sftpClientConfiguration.getPort());
-        factory.setUser(sftpClientConfiguration.getUser());
-        if (sftpClientConfiguration.getPrivateKey() != null) {
-            factory.setPrivateKey(sftpClientConfiguration.getPrivateKey());
-            factory.setPrivateKeyPassphrase(sftpClientConfiguration.getPrivateKeyPassPhrase());
-        } else {
-            factory.setPassword(sftpClientConfiguration.getPassword());
-        }
-        factory.setAllowUnknownKeys(true);
-        // We return a caching session factory, so that we don't have to reconnect to SFTP server for each time
-        val cachingSessionFactory = new CachingSessionFactory<>(factory, sftpClientConfiguration.getSessionCacheSize());
-        cachingSessionFactory.setSessionWaitTimeout(sftpClientConfiguration.getSessionWaitTimeout());
-        log.warn("Initial bean: '{}'", cachingSessionFactory.getClass().getSimpleName());
-        return cachingSessionFactory;
-    }
-
-    @Bean
-    @ServiceActivator(inputChannel = "toSftpChannel")
-    @SuppressWarnings("UnresolvedMessageChannel")
-    public MessageHandler messageHandler(SessionFactory<ChannelSftp.LsEntry> sftpSessionFactory,
-                                         SftpClientConfiguration sftpClientConfiguration) {
-        val handler = new SftpMessageHandler(sftpSessionFactory);
-        handler.setRemoteDirectoryExpression(new LiteralExpression(sftpClientConfiguration.getDirectory()));
-        handler.setFileNameGenerator(message -> {
-            if (message.getPayload() instanceof File) {
-                return ((File) message.getPayload()).getName();
-            } else {
-                throw new IllegalArgumentException("File expected as payload.");
-            }
-        });
-        log.warn("Initial bean: '{}'", handler.getClass().getSimpleName());
-        return handler;
-    }
-
-    @Bean
-    public SftpRemoteFileTemplate sftpRemoteFileTemplate(SessionFactory<ChannelSftp.LsEntry> sftpSessionFactory,
-                                                         SftpClientConfiguration sftpClientConfiguration) {
-        val sftpRemoteFileTemplate = new SftpRemoteFileTemplate(sftpSessionFactory);
-        sftpRemoteFileTemplate.setRemoteDirectoryExpression(
-                new LiteralExpression(sftpClientConfiguration.getDirectory()));
-        sftpRemoteFileTemplate.setAutoCreateDirectory(true);
-        // sftpRemoteFileTemplate.setBeanFactory(beanFactory);
-        sftpRemoteFileTemplate.afterPropertiesSet();
-        log.warn("Initial bean: '{}'", sftpRemoteFileTemplate.getClass().getSimpleName());
-        return sftpRemoteFileTemplate;
-    }
-
-    @Bean
-    public SftpSubDirectoryRunner sftpSubDirectoryRunner(SftpRemoteFileTemplate sftpRemoteFileTemplate,
-                                                         SftpClientConfiguration sftpClientConfiguration) {
-        log.warn("Initial bean: '{}'", SftpSubDirectoryRunner.class.getSimpleName());
-        return new SftpSubDirectoryRunner(sftpRemoteFileTemplate, sftpClientConfiguration);
-    }
-
-    @Bean
-    public SftpHelper sftpHelper(SftpRemoteFileTemplate sftpRemoteFileTemplate) {
-        log.warn("Initial bean: '{}'", SftpHelper.class.getSimpleName());
-        return new SftpHelper(sftpRemoteFileTemplate);
-    }
-}
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpHelper.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpHelper.java
deleted file mode 100644
index ca52fb97..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpHelper.java
+++ /dev/null
@@ -1,172 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import com.jcraft.jsch.ChannelSftp;
-import com.jmsoftware.maf.springcloudstarter.util.FileUtil;
-import javassist.NotFoundException;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import lombok.val;
-import org.springframework.integration.file.support.FileExistsMode;
-import org.springframework.integration.sftp.session.SftpRemoteFileTemplate;
-import org.springframework.integration.support.MessageBuilder;
-import org.springframework.messaging.Message;
-import org.springframework.validation.annotation.Validated;
-import org.springframework.web.multipart.MultipartFile;
-
-import javax.validation.Valid;
-import javax.validation.constraints.NotBlank;
-import javax.validation.constraints.NotNull;
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Arrays;
-import java.util.List;
-import java.util.concurrent.atomic.AtomicReference;
-
-/**
- * Description: Sftp Helper
- *
- * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com, date: 2/26/2021 3:47 PM
- */
-@Slf4j
-@Validated
-@RequiredArgsConstructor
-@SuppressWarnings("unused")
-public class SftpHelper {
-    /**
-     * The Sftp remote file template.
-     */
-    private final SftpRemoteFileTemplate sftpRemoteFileTemplate;
-
-    /**
-     * List all files under the full path
-     *
-     * @param fullPath directory full path
-     * @return file names
-     */
-    public List<String> listFiles(@NotBlank String fullPath) {
-        log.info("Listing files, full path: {}", fullPath);
-        return this.sftpRemoteFileTemplate.execute(session -> {
-            var strings = new String[0];
-            try {
-                strings = session.listNames(fullPath);
-            } catch (IOException e) {
-                log.error("Exception occurred when listing files. Exception message: {}", e.getMessage(), e);
-            }
-            return Arrays.asList(strings);
-        });
-    }
-
-    /**
-     * Check whether file exists according to file path
-     *
-     * @param fileFullPath file's full path
-     * @return true - file exists; false - file not exists
-     */
-    public boolean exist(@NotBlank String fileFullPath) {
-        log.info("Checking whether file exists in SFTP server, file full path: {}", fileFullPath);
-        return this.sftpRemoteFileTemplate.execute(session -> session.exists(fileFullPath));
-    }
-
-    /**
-     * Get file size
-     *
-     * @param fileFullPath file's full path
-     * @return file size (size unit: byte). Null if the file does not exist or path refers to a directory
-     * @throws IllegalArgumentException when file does not exist
-     */
-    public Long getFileSize(@NotBlank String fileFullPath) throws IllegalArgumentException {
-        if (!this.exist(fileFullPath)) {
-            throw new IllegalArgumentException(
-                    "Cannot get file size from SFTP server. Caused by: file does not exist, full path: " + fileFullPath);
-        }
-        String[] splits = fileFullPath.split("/");
-        String fileName = splits[splits.length - 1];
-        String listPath = fileFullPath.substring(0, fileFullPath.lastIndexOf(fileName) - 1);
-        log.info("Retrieve file size from SFTP server, full path: {}", fileFullPath);
-        final Long[] fileSize = new Long[1];
-        this.sftpRemoteFileTemplate.execute(session -> {
-            ChannelSftp.LsEntry[] lsEntries = session.list(listPath);
-            for (ChannelSftp.LsEntry lsEntry : lsEntries) {
-                if (lsEntry.getFilename().equals(fileName)) {
-                    fileSize[0] = lsEntry.getAttrs().getSize();
-                }
-            }
-            return null;
-        });
-        return fileSize[0];
-    }
-
-    /**
-     * Upload single file
-     *
-     * @param sftpUploadFile encapsulated object
-     * @return file 's full path if successful, else null
-     */
-    public String upload(@Valid SftpUploadFile sftpUploadFile) {
-        log.info("Uploading single file to SFTP server. SftpUploadFile: {}", sftpUploadFile);
-        Message<File> message = MessageBuilder.withPayload(sftpUploadFile.getFileToBeUploaded()).build();
-        return this.sftpRemoteFileTemplate.send(message, sftpUploadFile.getSubDirectory(),
-                                                sftpUploadFile.getFileExistsMode());
-    }
-
-    /**
-     * Upload file
-     *
-     * @param multipartFile  multipart file
-     * @param subDirectory   SFTP server's sub directory (if sub directory doesn't exist, will be auto created). Not
-     *                       empty and it looks like this: "/some/sub/directory/"
-     * @param fileExistsMode This enumeration indicates what action shall be taken in case the destination file
-     *                       already exists. In default, it should be set as: FileExistsMode.REPLACE
-     * @param deleteSource   true - delete source file; false - not delete source file
-     * @return file full path if successful, else null
-     * @throws IOException IO exception
-     */
-    public String upload(@NotNull MultipartFile multipartFile, @NotBlank String subDirectory,
-                         @NotNull FileExistsMode fileExistsMode, boolean deleteSource) throws IOException {
-        log.info("Uploading single multipart file to SFTP server. File name: {}", multipartFile.getOriginalFilename());
-        File file = FileUtil.convertFrom(multipartFile);
-        SftpUploadFile sftpUploadFile = SftpUploadFile.builder()
-                .fileToBeUploaded(file)
-                .subDirectory(subDirectory)
-                .fileExistsMode(fileExistsMode)
-                .build();
-        String fileFullPath = this.upload(sftpUploadFile);
-        if (deleteSource) {
-            val deleted = file.delete();
-            log.debug("File deleted: {}, {}", deleted, file);
-        }
-        return fileFullPath;
-    }
-
-    /**
-     * Read file from SFTP server
-     *
-     * @param fileFullPath file's full path
-     * @return buffered file stream
-     * @throws NotFoundException when file does not exist
-     */
-    public BufferedInputStream read(@NotBlank String fileFullPath) throws NotFoundException {
-        log.info("Read file from SFTP server, file full path: {}", fileFullPath);
-        val inputStream = new AtomicReference<InputStream>();
-        val got = this.sftpRemoteFileTemplate.get(fileFullPath, inputStream::set);
-        if (!got) {
-            val errorMessage = String.format("Cannot find the file! fileFullPath: %s", fileFullPath);
-            log.error(errorMessage);
-            throw new NotFoundException(errorMessage);
-        }
-        return new BufferedInputStream(inputStream.get());
-    }
-
-    /**
-     * Delete file according to file path
-     *
-     * @param fileFullPath file's full path
-     * @return true - file deleted; false - file not deleted
-     */
-    public boolean delete(@NotBlank String fileFullPath) {
-        log.warn("Deleting SFTP server's file by file full path: {}", fileFullPath);
-        return this.sftpRemoteFileTemplate.remove(fileFullPath);
-    }
-}
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectory.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectory.java
deleted file mode 100644
index 86bc2ef0..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectory.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import lombok.Getter;
-
-/**
- * <h1>SftpSubDirectory</h1>
- * <p>Reminder: if you want to add more custom sub directories in the future, please add en enum item in this class</p>
- *
- * TODO: think of another better way to configure the directory
- *
- * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com
- * @date 2019-07-04 23:10
- **/
-@Getter
-public enum SftpSubDirectory {
-    /**
-     * Sub directory for video
-     */
-    VIDEO("video", "/video/"),
-    /**
-     * Sub directory for avatar
-     */
-    AVATAR("avatar", "/avatar/");
-
-    private final String directoryName;
-    private final String subDirectory;
-
-    SftpSubDirectory(String directoryName, String subDirectory) {
-        this.directoryName = directoryName;
-        this.subDirectory = subDirectory;
-    }
-}
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectoryRunner.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectoryRunner.java
deleted file mode 100644
index 0daa2820..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpSubDirectoryRunner.java
+++ /dev/null
@@ -1,53 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import lombok.val;
-import org.springframework.boot.ApplicationArguments;
-import org.springframework.boot.ApplicationRunner;
-import org.springframework.integration.sftp.session.SftpRemoteFileTemplate;
-
-/**
- * <h1>SftpSubDirectoryRunner</h1>
- * <p>After dependency injection finished, we must inti the SFTP server's sub-directory for out business. If you want
- * to customize initialization configuration, config SftpSubDirectory.</p>
- *
- * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com
- * @date 2019-07-05 08:51
- * @see SftpSubDirectory
- **/
-@Slf4j
-@RequiredArgsConstructor
-public class SftpSubDirectoryRunner implements ApplicationRunner {
-    private final SftpRemoteFileTemplate sftpRemoteFileTemplate;
-    private final SftpClientConfiguration sftpClientConfiguration;
-
-    @Override
-    public void run(ApplicationArguments args) {
-        this.sftpRemoteFileTemplate.setAutoCreateDirectory(true);
-        this.sftpRemoteFileTemplate.execute(session -> {
-            if (!session.exists(this.sftpClientConfiguration.getDirectory())) {
-                log.info("Make directories for SFTP server. Directory: {}", this.sftpClientConfiguration.getDirectory());
-                session.mkdir(this.sftpClientConfiguration.getDirectory());
-            } else {
-                log.info("SFTP server remote directory exists: {}", this.sftpClientConfiguration.getDirectory());
-            }
-            return null;
-        });
-
-        log.info("Staring to initial SFTP server sub-directory.");
-        this.sftpRemoteFileTemplate.execute(session -> {
-            for (val sftpSubDirectory : SftpSubDirectory.values()) {
-                val fullPath = this.sftpClientConfiguration.getDirectory() + sftpSubDirectory.getSubDirectory();
-                if (!session.exists(fullPath)) {
-                    log.info("SFTP server sub-directory does not exist. Creating sub-directory: {}", fullPath);
-                    session.mkdir(fullPath);
-                } else {
-                    log.info("SFTP server sub-directory exists. Path: {}", fullPath);
-                }
-            }
-            return null;
-        });
-        log.warn("Initialing SFTP server sub-directory is done.");
-    }
-}
diff --git a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpUploadFile.java b/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpUploadFile.java
deleted file mode 100644
index 22e92125..00000000
--- a/spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/sftp/SftpUploadFile.java
+++ /dev/null
@@ -1,38 +0,0 @@
-package com.jmsoftware.maf.springcloudstarter.sftp;
-
-import lombok.Builder;
-import lombok.Data;
-import org.springframework.integration.file.support.FileExistsMode;
-
-import javax.validation.constraints.NotBlank;
-import javax.validation.constraints.NotNull;
-import java.io.File;
-
-/**
- * <h1>SftpUploadFile</h1>
- * <p>Change description here</p>
- *
- * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com
- * @date 2019-07-06 11:22
- **/
-@Data
-@Builder
-public class SftpUploadFile {
-    /**
-     * File to be uploaded to SFTP server
-     */
-    @NotNull
-    private File fileToBeUploaded;
-    /**
-     * SFTP server's sub directory (if sub directory does'nt exist, will be auto created). Not empty and it looks
-     * like this: "/some/sub/directory/"
-     */
-    @NotBlank
-    private String subDirectory;
-    /**
-     * This enumeration indicates what action shall be taken in case the destination file already exists. In default,
-     * it should be set as: FileExistsMode.REPLACE
-     */
-    @NotNull
-    private FileExistsMode fileExistsMode;
-}