diff --git a/frontend/src/components/TradeBox/EncryptedChat/index.tsx b/frontend/src/components/TradeBox/EncryptedChat/index.tsx
index 2c07020b..1cdfa0f0 100644
--- a/frontend/src/components/TradeBox/EncryptedChat/index.tsx
+++ b/frontend/src/components/TradeBox/EncryptedChat/index.tsx
@@ -82,6 +82,8 @@ const EncryptedChat: React.FC<Props> = ({
 
     const wrappedEvent = nip17.wrapEvent(slot?.nostrSecKey, recipient, content);
 
+    wrappedEvent.tags.push(['expiration', (wrappedEvent.created_at + 2419200).toString()]);
+
     federation.roboPool.sendEvent(wrappedEvent);
   };