diff --git a/senlinclient/tests/unit/v1/test_shell.py b/senlinclient/tests/unit/v1/test_shell.py
index 8cd23e54..31c4374c 100644
--- a/senlinclient/tests/unit/v1/test_shell.py
+++ b/senlinclient/tests/unit/v1/test_shell.py
@@ -511,7 +511,7 @@ class ShellTest(testtools.TestCase):
             'type': 'webhook',
             'cluster': 'cluster1',
             'action': 'CLUSTER_SCALE_IN',
-            'params': {}
+            'params': []
         }
         args = self._make_args(args)
         params = {
@@ -535,7 +535,7 @@ class ShellTest(testtools.TestCase):
             'type': 'webhook',
             'cluster': None,
             'action': None,
-            'params': {}
+            'params': []
         }
         args = self._make_args(args)
         ex = self.assertRaises(exc.CommandError,
@@ -552,7 +552,7 @@ class ShellTest(testtools.TestCase):
             'type': 'foo',
             'cluster': None,
             'action': None,
-            'params': {}
+            'params': []
         }
         args = self._make_args(args)
         params = {
@@ -576,13 +576,13 @@ class ShellTest(testtools.TestCase):
             'name': 'receiver2',
             'id': 'receiver_id',
             'action': 'CLUSTER_SCALE_OUT',
-            'params': {'count': '2'}
+            'params': ['key1=value1;key2=value2']
         }
         args = self._make_args(args)
         params = {
             'name': 'receiver2',
             'action': 'CLUSTER_SCALE_OUT',
-            'params': {'count': '2'}
+            'params': {'key1': 'value1', 'key2': 'value2'}
         }
         receiver = mock.Mock()
         receiver.id = 'receiver_id'
diff --git a/senlinclient/v1/receiver.py b/senlinclient/v1/receiver.py
index dbc43f56..67ad8a95 100644
--- a/senlinclient/v1/receiver.py
+++ b/senlinclient/v1/receiver.py
@@ -214,7 +214,7 @@ class CreateReceiver(command.ShowOne):
 
 
 class UpdateReceiver(command.ShowOne):
-    """Create a receiver."""
+    """Update a receiver."""
 
     log = logging.getLogger(__name__ + ".UpdateReceiver")
 
diff --git a/senlinclient/v1/shell.py b/senlinclient/v1/shell.py
index ac5380a3..51f4172e 100644
--- a/senlinclient/v1/shell.py
+++ b/senlinclient/v1/shell.py
@@ -1584,7 +1584,7 @@ def do_receiver_update(service, args):
     params = {
         'name': args.name,
         'action': args.action,
-        'params': args.params
+        'params': utils.format_parameters(args.params)
     }
 
     # Find the receiver first, we need its id