diff --git a/CHANGES.md b/CHANGES.md
index a5c9612..e0ea6dd 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v1.5.0
+
+* Enabled to pass parameters how to connect ACOS appliance
+
 ## v1.4.0
 
 * Added actions to get slb template lists.
diff --git a/actions/acoslib/action.py b/actions/acoslib/action.py
index 18c79d8..13d833f 100644
--- a/actions/acoslib/action.py
+++ b/actions/acoslib/action.py
@@ -24,10 +24,19 @@ def login(self, target, specified_target=None):
                 config = specified_target
             else:
                 config = next(x for x in self.config['appliance'] if x['target'] == target)
+
+            extra_params = {
+                "max_retries": config.get("max_retries", 3),
+                "port": config.get("port", 443),
+                "protocol": config.get("protocol", "https"),
+                "timeout": config.get("timeout", 5),
+            }
+
             return acos.Client(config['target'],
                                config['api_version'],
                                config['userid'],
-                               config['passwd'])
+                               config['passwd'],
+                               **extra_params)
         except acos.errors.ACOSUnsupportedVersion as e:
             self.logger.error(e)
         except KeyError as e:
diff --git a/pack.yaml b/pack.yaml
index 994326a..fad4c6b 100644
--- a/pack.yaml
+++ b/pack.yaml
@@ -7,7 +7,7 @@ keywords:
   - load balancer
   - ADC
   - network
-version: 1.4.0
+version: 1.5.0
 author: Hiroyasu OHYAMA
 email: user.localhost2000@gmail.com
 python_versions:
diff --git a/tests/test_specified_target.py b/tests/test_specified_target.py
index 4e8b3db..22e274a 100644
--- a/tests/test_specified_target.py
+++ b/tests/test_specified_target.py
@@ -16,11 +16,60 @@ def setUp(self):
 
     @mock.patch('acos_client.Client')
     def test_specified_target_without_one_target(self, mock_client):
-        # set mock of action
-        mock_action = mock.Mock()
-        mock_action.slb.server.get.return_value = 'test-result'
+        def side_effect(*args, **extra_params):
+            # This checks authentication information that is passed to acos.Client
+            self.assertEqual(args, ('appliance_acos_v2.1', 'v2.1', 'admin', 'hoge'))
 
-        mock_client.return_value = mock_action
+            # This checks default extra params are set
+            self.assertEqual(extra_params, {
+                'max_retries': 3, 'port': 443, 'protocol': 'https', 'timeout': 5
+            })
+
+            # set mock of action
+            mock_action = mock.Mock()
+            mock_action.slb.server.get.return_value = 'test-result'
+
+            return mock_action
+
+        mock_client.side_effect = side_effect
+
+        # execute action
+        params = {
+            'object_path': 'slb.server',
+            'action': 'get',
+            'name': 'hoge',
+            'one_target': False,
+            'specified_target': {
+                'target': 'appliance_acos_v2.1',
+                'userid': 'admin',
+                'passwd': 'hoge',
+                'api_version': 'v2.1',
+            }
+        }
+        result = self.action.run(**params)
+
+        self.assertTrue(result[0])
+        self.assertEqual(result[1], 'test-result')
+        self.assertEqual(len(self._log_handler.messages['error']), 0)
+
+    @mock.patch('acos_client.Client')
+    def test_specified_target_with_extra_params(self, mock_client):
+        def side_effect(*args, **extra_params):
+            # This checks authentication information that is passed to acos.Client
+            self.assertEqual(args, ('appliance_acos_v2.1', 'v2.1', 'admin', 'hoge'))
+
+            # This checks extra params are set as user specified
+            self.assertEqual(extra_params, {
+                'max_retries': 10, 'port': 80, 'protocol': 'http', 'timeout': 10
+            })
+
+            # set mock of action
+            mock_action = mock.Mock()
+            mock_action.slb.server.get.return_value = 'test-result'
+
+            return mock_action
+
+        mock_client.side_effect = side_effect
 
         # execute action
         params = {
@@ -33,6 +82,10 @@ def test_specified_target_without_one_target(self, mock_client):
                 'userid': 'admin',
                 'passwd': 'hoge',
                 'api_version': 'v2.1',
+                'max_retries': 10,
+                'port': 80,
+                'protocol': 'http',
+                'timeout': 10,
             }
         }
         result = self.action.run(**params)