diff --git a/README.md b/README.md
index 68fc758..dfb71ff 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ https://github.com/user-attachments/assets/6182efdb-9862-47ee-9fa7-011a64ee87eb
 
 | Layer | Technology |
 |---|---|
-| BitTorrent engine | [libtorrent-rasterbar](https://libtorrent.org) RC_2_0 (C++17, BSD-3-Clause) |
+| BitTorrent engine | [libtorrent-rasterbar](https://libtorrent.org) RC_2_1 (C++17, BSD-3-Clause) |
 | Native bridge | Android NDK r29, JNI (`torrent_jni.cpp`) |
 | Build system | CMake 3.22, Gradle AGP 9.0.1 |
 | Language | Kotlin 2.3.20 |
@@ -109,7 +109,7 @@ SimpleTorrent/
 │   └── res/
 │       ├── drawable/               # Adaptive icon (vector magnet)
 │       └── xml/file_provider_paths.xml
-├── libs/libtorrent/                # Git submodule (RC_2_0 branch)
+├── libs/libtorrent/                # Git submodule (RC_2_1 branch)
 ├── .github/workflows/android.yml  # CI pipeline
 ├── LICENSE                        # MIT (app) + BSD-3-Clause (libtorrent)
 └── README.md
diff --git a/app/src/main/cpp/CMakeLists.txt b/app/src/main/cpp/CMakeLists.txt
index f42edc5..773d874 100644
--- a/app/src/main/cpp/CMakeLists.txt
+++ b/app/src/main/cpp/CMakeLists.txt
@@ -17,6 +17,8 @@ endif()
 
 set(BUILD_SHARED_LIBS   OFF CACHE BOOL "" FORCE)
 set(encryption          OFF CACHE BOOL "" FORCE)
+# WebTorrent (libtorrent 2.1+) needs libdatachannel + a TLS stack; staged for later
+set(webtorrent          OFF CACHE BOOL "" FORCE)
 set(dht                 ON  CACHE BOOL "" FORCE)
 set(build_tests         OFF CACHE BOOL "" FORCE)
 set(build_examples      OFF CACHE BOOL "" FORCE)
diff --git a/app/src/main/java/com/jpcottin/simpletorrent/data/SampleTorrents.kt b/app/src/main/java/com/jpcottin/simpletorrent/data/SampleTorrents.kt
index 3b82826..42bec37 100644
--- a/app/src/main/java/com/jpcottin/simpletorrent/data/SampleTorrents.kt
+++ b/app/src/main/java/com/jpcottin/simpletorrent/data/SampleTorrents.kt
@@ -22,6 +22,11 @@ val SAMPLE_TORRENTS = listOf(
         "Blender film, CC BY 3.0",
         "magnet:?xt=urn:btih:08ada5a7a6183aae1e09d831df6748d566095a10&dn=Sintel&tr=udp%3A%2F%2Fexplodie.org%3A6969&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Ftracker.empire-js.us%3A1337&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337&tr=wss%3A%2F%2Ftracker.btorrent.xyz&tr=wss%3A%2F%2Ftracker.fastcast.nz&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2F&xs=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Fsintel.torrent",
     ),
+    SampleTorrent(
+        "Sintel as WebTorrent",
+        "Same film with wss:// trackers — WebTorrent demo, browser-peer support coming",
+        "magnet:?xt=urn:btih:08ada5a7a6183aae1e09d831df6748d566095a10&dn=Sintel&tr=wss%3A%2F%2Ftracker.webtorrent.dev&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&tr=wss%3A%2F%2Ftracker.btorrent.xyz&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2F&xs=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Fsintel.torrent",
+    ),
     SampleTorrent(
         "Tears of Steel",
         "Blender film, CC BY 3.0, includes subtitles",
diff --git a/libs/libtorrent b/libs/libtorrent
index 8d58b0e..8726401 160000
--- a/libs/libtorrent
+++ b/libs/libtorrent
@@ -1 +1 @@
-Subproject commit 8d58b0e78b9d646c3ccce433bc52d58f341908ed
+Subproject commit 87264011d17e167a50149a3b7e212f8205ca0416