diff --git a/nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/moq/lite/MoqLiteMessages.kt b/nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/moq/lite/MoqLiteMessages.kt
index 3d8504c1a..0ad9d08d6 100644
--- a/nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/moq/lite/MoqLiteMessages.kt
+++ b/nestsClient/src/commonMain/kotlin/com/vitorpamplona/nestsclient/moq/lite/MoqLiteMessages.kt
@@ -21,14 +21,23 @@
 package com.vitorpamplona.nestsclient.moq.lite
 
 /**
- * moq-lite ALPN strings. Lite-03 is preferred; `"moql"` is the legacy
- * combined ALPN that requires an in-band SETUP exchange.
+ * moq-lite ALPN strings. The on-the-wire framing for Subscribe / Group
+ * / Announce did NOT change between Lite-03 and Lite-04, so advertising
+ * both via `wt-available-protocols` is safe — the relay picks whichever
+ * it prefers and our existing codec paths handle either. We keep 03 in
+ * the list as the previously-tested target until the production relay's
+ * Lite-04 path has interop coverage.
+ *
+ * `"moql"` is the legacy combined ALPN that requires an in-band SETUP
+ * exchange — kept here for completeness; not advertised by the
+ * factory.
  *
  * Source: `kixelated/moq-rs/rs/moq-lite/src/version.rs:21-26`,
  * `@moq/lite/connection/connect.js:277`.
  */
 object MoqLiteAlpn {
     const val LITE_03: String = "moq-lite-03"
+    const val LITE_04: String = "moq-lite-04"
     const val LEGACY: String = "moql"
 }
 
diff --git a/nestsClient/src/jvmAndroid/kotlin/com/vitorpamplona/nestsclient/transport/QuicWebTransportFactory.kt b/nestsClient/src/jvmAndroid/kotlin/com/vitorpamplona/nestsclient/transport/QuicWebTransportFactory.kt
index 5f24c438d..f305fc24c 100644
--- a/nestsClient/src/jvmAndroid/kotlin/com/vitorpamplona/nestsclient/transport/QuicWebTransportFactory.kt
+++ b/nestsClient/src/jvmAndroid/kotlin/com/vitorpamplona/nestsclient/transport/QuicWebTransportFactory.kt
@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.nestsclient.transport
 
+import com.vitorpamplona.nestsclient.moq.lite.MoqLiteAlpn
 import com.vitorpamplona.quic.connection.QuicConnection
 import com.vitorpamplona.quic.connection.QuicConnectionConfig
 import com.vitorpamplona.quic.connection.QuicConnectionDriver
@@ -89,8 +90,19 @@ class QuicWebTransportFactory(
      * post-CONNECT message is decoded as SETUP_CLIENT, producing
      * `connection closed err=invalid value` on the relay side and a stalled
      * subscribe / `subscribe stream FIN before reply` on the client side.
+     *
+     * `moq-lite-04` is also advertised because the production relay
+     * (moq.nostrnests.com) and the kixelated browser client both ship
+     * Lite-04 now; without it in our list a Lite-04-only deployment
+     * would refuse the CONNECT. The on-the-wire framing for Subscribe /
+     * Group / Announce did NOT change between Lite-03 and Lite-04, so
+     * our existing codec handles either selection. List `moq-lite-03`
+     * first because it's our previously-tested negotiation target —
+     * a relay that supports both should pick the listed-first option,
+     * and a Lite-04-only relay falls through to the second entry.
      */
-    private val webTransportSubProtocols: List<String> = listOf("moq-lite-03"),
+    private val webTransportSubProtocols: List<String> =
+        listOf(MoqLiteAlpn.LITE_03, MoqLiteAlpn.LITE_04),
 ) : WebTransportFactory {
     override suspend fun connect(
         authority: String,