diff --git a/src/main/java/com/lightstreamer/examples/chat_demo/adapters/ChatMetadataAdapter.java b/src/main/java/com/lightstreamer/examples/chat_demo/adapters/ChatMetadataAdapter.java
index 77e5975..a8bd280 100644
--- a/src/main/java/com/lightstreamer/examples/chat_demo/adapters/ChatMetadataAdapter.java
+++ b/src/main/java/com/lightstreamer/examples/chat_demo/adapters/ChatMetadataAdapter.java
@@ -113,7 +113,7 @@ public CompletionStage<String> notifyUserMessage(String user, String session, St
         this.loadChatFeed();
         this.handleChatMessage(pieces,message,session);
 
-        return CompletableFuture.completedStage(null);
+        return CompletableFuture.completedFuture(null);
     }
 
     public void notifyNewSession(String user, String session, Map sessionInfo)