diff --git a/src/signaling.rs b/src/signaling.rs
index c7f792bd264a16b0ff9cd3cd98b596cd75da87a1..05344217714064feae497d4206bb285c27ff28f4 100644
--- a/src/signaling.rs
+++ b/src/signaling.rs
@@ -86,7 +86,7 @@ impl Signaling {
         let mut websocket_request = settings.websocket_url().into_client_request()?;
         websocket_request.headers_mut().insert(
             SEC_WEBSOCKET_PROTOCOL,
-            format!("opentalk-signaling-json-v1.0,ticket#{}", ticket).try_into()?,
+            format!("k3k-signaling-json-v1.0,ticket#{}", ticket).try_into()?,
         );
 
         let (mut stream, _) = tt::connect_async(websocket_request)