diff --git a/poetry.lock b/poetry.lock
index abf9375..40aec2f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -326,7 +326,7 @@ typing-extensions = "^4.8.0"
 type = "git"
 url = "https://github.com/sartography/spiffworkflow-connector-command.git"
 reference = "main"
-resolved_reference = "88bcbafdb1ffbf3f85fa9f13e05e41ace48b0988"
+resolved_reference = "022c01826e98fd3997ec21652c88c1343279b6f4"
 
 [[package]]
 name = "tomli"
diff --git a/src/connector_slack/commands/post_message.py b/src/connector_slack/commands/post_message.py
index c53d26d..2038f9e 100644
--- a/src/connector_slack/commands/post_message.py
+++ b/src/connector_slack/commands/post_message.py
@@ -1,9 +1,10 @@
 """Send message to a slack channel."""
+import json
 from typing import Any
 
 import requests  # type: ignore
 from spiffworkflow_connector_command.command_interface import CommandErrorDict
-from spiffworkflow_connector_command.command_interface import CommandResultDictV2
+from spiffworkflow_connector_command.command_interface import CommandResponseDict
 from spiffworkflow_connector_command.command_interface import ConnectorCommand
 from spiffworkflow_connector_command.command_interface import ConnectorProxyResponseDict
 
@@ -25,7 +26,7 @@ class PostMessage(ConnectorCommand):
         self.channel = channel
         self.message = message
 
-    def execute(self, _config: Any, _task_data: Any) -> CommandResultDictV2:
+    def execute(self, _config: Any, _task_data: Any) -> ConnectorProxyResponseDict:
 
         headers = {"Authorization": f"Bearer {self.token}",
                    "Content-type": "application/json"}
@@ -60,14 +61,16 @@ class PostMessage(ConnectorCommand):
             error = {"error_code": exception.__class__.__name__, "message": str(exception)}
             status = 500
 
-        return_response: ConnectorProxyResponseDict = {
-            "command_response": command_response,
-            "error": error,
-        }
-        result: CommandResultDictV2 = {
-            "response": return_response,
-            "status": status,
+        return_response: CommandResponseDict = {
+            "body": json.dumps(command_response),
             "mimetype": "application/json",
+            "http_status": status,
+        }
+        result: ConnectorProxyResponseDict = {
+            "command_response": return_response,
+            "error": error,
+            "command_response_version": 2,
+
         }
 
         return result
diff --git a/tests/connector_slack/unit/test_post_message.py b/tests/connector_slack/unit/test_post_message.py
index e620253..c64079f 100644
--- a/tests/connector_slack/unit/test_post_message.py
+++ b/tests/connector_slack/unit/test_post_message.py
@@ -1,3 +1,4 @@
+import json
 from unittest.mock import MagicMock
 from unittest.mock import patch
 
@@ -32,9 +33,11 @@ class TestPostMessage:
             mock_post.return_value.json = MagicMock(return_value=success_response)
             poster = PostMessage('xxx', 'my_channel', 'hello world!')
             response = poster.execute({}, {})
-            assert response['status'] == 200
-            assert response['mimetype'] == "application/json"
-            assert response['response']['command_response'] == success_response
+            assert response['command_response'] == {
+                "body": json.dumps(success_response),
+                "mimetype": "application/json",
+                "http_status": 200
+            }
 
 
     def test_connection_error(self) -> None:
@@ -42,12 +45,15 @@ class TestPostMessage:
             mock_post.return_value.status_code = 404
             poster = PostMessage('xxx', 'my_channel', 'hello world!')
             response = poster.execute({}, {})
-            assert response['status'] == 404
-            assert response['mimetype'] == "application/json"
-            assert response["response"]["error"] is not None
-            assert "error_code" in response["response"]["error"]
-            assert response["response"]["error"]["error_code"] == "SlackMessageFailed"
-            assert response["response"]["error"]["message"] == "Unreadable (non JSON) response from Slack"
+            assert response['command_response'] == {
+                "body": '{}',
+                "mimetype": "application/json",
+                "http_status": 404
+            }
+            assert response["error"] is not None
+            assert "error_code" in response["error"]
+            assert response["error"]["error_code"] == "SlackMessageFailed"
+            assert response["error"]["message"] == "Unreadable (non JSON) response from Slack"
 
     def test_error_from_slack(self) -> None:
         example_error = {'ok': False, 'error': 'invalid_arguments', 'warning': 'missing_charset',
@@ -59,9 +65,12 @@ class TestPostMessage:
             mock_post.return_value.json = MagicMock(return_value=example_error)
             poster = PostMessage('xxx', 'my_channel', 'hello world!')
             response = poster.execute({}, {})
-            assert response['status'] == 400
-            assert response['mimetype'] == "application/json"
-            assert response["response"]["error"] is not None
-            assert "error_code" in response["response"]["error"]
-            assert response["response"]["error"]["error_code"] == "SlackMessageFailed"
-            assert response["response"]["error"]["message"] == "[ERROR] missing required field: channel"
+            assert response['command_response'] == {
+                "body": '{}',
+                "mimetype": "application/json",
+                "http_status": 400
+            }
+            assert response["error"] is not None
+            assert "error_code" in response["error"]
+            assert response["error"]["error_code"] == "SlackMessageFailed"
+            assert response["error"]["message"] == "[ERROR] missing required field: channel"