diff --git a/parsons/action_network/action_network.py b/parsons/action_network/action_network.py
index 7858f3e3f6..07d528fbfb 100644
--- a/parsons/action_network/action_network.py
+++ b/parsons/action_network/action_network.py
@@ -905,7 +905,7 @@ def create_message(self, payload):
         `Documentation Reference`:
             https://actionnetwork.org/docs/v2/messages
         """
-        return self.api.post_request("messages", payload)
+        return self.api.post_request("messages", json=payload)
 
     def update_message(self, message_id, payload):
         """