diff --git a/src/index.ts b/src/index.ts
index 090a147..e761b5c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -33,6 +33,7 @@ export const UDP = and(IP, base('udp'))
 export const UTP = and(UDP, base('utp'))
 
 export const QUIC = and(UDP, base('quic'))
+export const QUICV1 = and(UDP, base('quic-v1'))
 
 export const WebSockets = or(
   and(TCP, base('ws')),
@@ -64,6 +65,12 @@ export const WebRTCDirect = or(
   _WebRTCDirect
 )
 
+const _WebTransport = and(QUICV1, base('webtransport'), base('certhash'), base('certhash'))
+export const WebTransport = or(
+  and(_WebTransport, base('p2p')),
+  _WebTransport
+)
+
 /**
  * @deprecated
  */
@@ -102,7 +109,8 @@ export const Reliable = or(
   UTP,
   QUIC,
   DNS,
-  WebRTCDirect
+  WebRTCDirect,
+  WebTransport
 )
 
 // Unlike ws-star, stardust can run over any transport thus removing the requirement for websockets (but don't even think about running a stardust server over webrtc-star ;) )
@@ -116,6 +124,7 @@ const _P2P = or(
   P2PWebRTCStar,
   P2PWebRTCDirect,
   WebRTCDirect,
+  WebTransport,
   base('p2p')
 )
 
diff --git a/test/index.spec.ts b/test/index.spec.ts
index c55b2e8..ccda9d4 100644
--- a/test/index.spec.ts
+++ b/test/index.spec.ts
@@ -212,6 +212,24 @@ describe('multiaddr validation', function () {
     '/ip4/0.0.0.0/tcp/12345/udp/2222/wss/webrtc'
   ]
 
+  const goodWebTransport = [
+    '/ip4/10.5.0.2/udp/4001/quic-v1/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/uEiCoik2HBeT5oc9Jib3SQJzNjn9AnznMDpQWcOeKSuEc9A/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    '/ip4/127.0.0.1/udp/4001/quic-v1/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/uEiCoik2HBeT5oc9Jib3SQJzNjn9AnznMDpQWcOeKSuEc9A/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    '/ip4/97.126.16.119/udp/4001/quic-v1/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/uEiCoik2HBeT5oc9Jib3SQJzNjn9AnznMDpQWcOeKSuEc9A/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    '/ip6/::1/udp/4001/quic-v1/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/uEiCoik2HBeT5oc9Jib3SQJzNjn9AnznMDpQWcOeKSuEc9A/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v'
+  ]
+
+  const badWebTransport = [
+    // quic instead of quic-v1
+    '/ip4/10.5.0.2/udp/4001/quic/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/uEiCoik2HBeT5oc9Jib3SQJzNjn9AnznMDpQWcOeKSuEc9A/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    // missing second certhash value
+    '/ip4/10.5.0.2/udp/4001/quic-v1/webtransport/certhash/uEiDWmsTxXe55Mbwnvd1qrPZAcE5Jtc0tE9WtGXD_NpMERg/certhash/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    // missing webtransport/certhash base
+    '/ip4/10.5.0.2/udp/4001/quic-v1/webtransport/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v',
+    // missing value for base 'webtransport/certhash'  `${value}/certhash/${value}`
+    '/ip4/10.5.0.2/udp/4001/quic-v1/webtransport/certhash/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v'
+  ]
+
   function assertMatches (p: Mafmt, ...tests: string[][]): void {
     tests.forEach(function (test) {
       test.forEach(function (testcase) {
@@ -355,4 +373,9 @@ describe('multiaddr validation', function () {
     assertMatches(mafmt.WebRTC, goodWebRTC)
     assertMismatches(mafmt.WebRTC, badWebRTC)
   })
+
+  it('WebTransport validation', function () {
+    assertMatches(mafmt.WebTransport, goodWebTransport)
+    assertMismatches(mafmt.WebTransport, badWebTransport)
+  })
 })