diff --git a/index.js b/index.js
index 8dffcdf..b2e49c5 100644
--- a/index.js
+++ b/index.js
@@ -31,7 +31,7 @@ try {
 
         if(channelId.length > 0 && (message.length > 0 || payload)) {
             // post message
-            web.chat.postMessage({channel: channelId, text: message, ...(payload ?? {})});
+            web.chat.postMessage({channel: channelId, text: message, ...(payload || {})});
         } else {
             console.log('missing either channel-id, slack-message or payload! Did not send a message via chat.postMessage with botToken');
         }