diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0d9402..28f9227 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,11 +32,12 @@ jobs:
 
     - name: Install and start SFTP
       run: |
+        sudo apt install sshpass
         sudo apt install openssh-server
         sudo systemctl enable ssh
         sudo systemctl start ssh
         sudo sh -c 'echo "PubkeyAcceptedAlgorithms +ssh-rsa" >> /etc/ssh/sshd_config'
-        sudo systemctl restart ssh
+        sudo systemctl try-reload-or-restart ssh
         sudo cat /etc/ssh/sshd_config
         
     - name: Create a test user account
@@ -46,16 +47,15 @@ jobs:
         echo "adding user to group ${sshGroup}"
         sudo useradd -s /bin/bash -d /home/usr -m -g ${sshGroup} -p $(echo pwd | openssl passwd -1 -stdin) usr
         
-        sudo -u usr ssh-keygen -t rsa -N "123456" -f /home/usr/.ssh/sftptest
-        sudo -u usr sh -c 'cat /home/usr/.ssh/sftptest.pub >> /home/usr/.ssh/authorized_keys'
-        sudo chmod -R 600 /home/usr/.ssh/
-        sudo chmod 700 /home/usr/.ssh/authorized_keys
-        sudo cat /home/usr/.ssh/sftptest.pub
+        ssh-keygen -t rsa -b 4096 -N "" -f ~/.ssh/sftptest
+        sudo -u usr mkdir /home/usr/.ssh/
+        sudo cat ~/.ssh/sftptest.pub >> /home/usr/.ssh/authorized_keys
+        sudo chown -R usr /home/usr/.ssh
+        sudo chmod -R 600 /home/usr/.ssh
+        sudo chmod 600 /home/usr/.ssh/authorized_keys
         sudo cat /home/usr/.ssh/authorized_keys
-        
-        sudo cp /home/usr/.ssh/sftptest ${GITHUB_WORKSPACE}/sftp-connector-test/src_test/com/axonivy/connector/sftp/test/sftptest
-        sudo ssh-keygen -p -P "123456" -N "123456" -m pem -f ${GITHUB_WORKSPACE}/sftp-connector-test/src_test/com/axonivy/connector/sftp/test/sftptest
-        sudo chown "$(whoami)" ${GITHUB_WORKSPACE}/sftp-connector-test/src_test/com/axonivy/connector/sftp/test/sftptest
+        cp ~/.ssh/sftptest ${GITHUB_WORKSPACE}/sftp-connector-test/src_test/com/axonivy/connector/sftp/test/sftptest
+        ssh -v -o StrictHostKeyChecking=no -i ~/.ssh/sftptest usr@localhost 'cd ~/.ssh/'
 
     - name: Setup Maven
       uses: stCarolas/setup-maven@v5
@@ -68,6 +68,7 @@ jobs:
     - name: Print out log
       run: |
         sudo journalctl -u ssh
+        echo "======================================================="
         sudo cat /var/log/auth.log
 
     # - name: Publish Unit Test Results
diff --git a/sftp-connector/config/variables.yaml b/sftp-connector/config/variables.yaml
index 272aa86..afe98cb 100644
--- a/sftp-connector/config/variables.yaml
+++ b/sftp-connector/config/variables.yaml
@@ -11,15 +11,14 @@ Variables:
     username: 'usr'
     
     # Auth type to the SFPT server: password OR ssh
-    auth: 'password'
+    auth: 'ssh'
     
     # The password to the SFTP server
     # [password]
-    password: pwd
+    password: ''
     
     # The ssh key string to SFTP server
     # [secret private key]
-    secret_sshkey: ''
-
+    secret.sshkey: ''
     # The ssh key passphrase
-    secret_sshpassphrase: ''
+    secret.sshpassphrase: ''
diff --git a/sftp-connector/pom.xml b/sftp-connector/pom.xml
index 119c50d..6d43de1 100644
--- a/sftp-connector/pom.xml
+++ b/sftp-connector/pom.xml
@@ -11,9 +11,9 @@
   </properties>
   <dependencies>
     <dependency>
-      <groupId>com.jcraft</groupId>
+      <groupId>com.github.mwiede</groupId>
       <artifactId>jsch</artifactId>
-      <version>0.1.55</version>
+      <version>0.2.19</version>
     </dependency>
   </dependencies>
   <pluginRepositories>
diff --git a/sftp-connector/src/com/axonivy/connector/sftp/service/SftpClientService.java b/sftp-connector/src/com/axonivy/connector/sftp/service/SftpClientService.java
index a2d2616..633248c 100644
--- a/sftp-connector/src/com/axonivy/connector/sftp/service/SftpClientService.java
+++ b/sftp-connector/src/com/axonivy/connector/sftp/service/SftpClientService.java
@@ -8,6 +8,7 @@
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Properties;
 
 import org.apache.commons.lang3.StringUtils;
 import org.apache.log4j.Logger;
@@ -56,6 +57,7 @@ public class SftpClientService implements AutoCloseable {
 	 */
 	public SftpClientService(String host, int port, String username, String authType, String password, String keyString, String passphrase) throws IOException {
 		System.out.println(keyString);
+		System.out.println(passphrase);
 		try {
 			JSch jsch = new JSch();
 			
@@ -63,6 +65,11 @@ public SftpClientService(String host, int port, String username, String authType
 			if (StringUtils.isEmpty(authType) || PASSWORD.equalsIgnoreCase(authType)) {
 				session.setPassword(password);
 			} else {
+				session.setConfig("PreferredAuthentications", "publickey");
+//				Properties config = new Properties();
+//				config.put("PubkeyAcceptedKeyTypes", "ssh-rsa");
+//				config.put("HostKeyAlgorithms", "ssh-rsa");
+//				session.setConfig(config);
 				jsch.addIdentity(null, keyString.getBytes(), null, passphrase.getBytes());
 			}