diff --git a/eth/utp/utp_router.nim b/eth/utp/utp_router.nim
index 91f6e17..f0b4940 100644
--- a/eth/utp/utp_router.nim
+++ b/eth/utp/utp_router.nim
@@ -38,7 +38,7 @@ type
   # ``server`` - UtpProtocol object.
   # ``client`` - accepted client utp socket.
   AcceptConnectionCallback*[A] = proc(server: UtpRouter[A],
-    client: UtpSocket[A]): Future[void] {.gcsafe, raises: [].}
+    client: UtpSocket[A]): Future[void] {.gcsafe, async: (raw: true, raises: []).}
 
   # Callback to act as firewall for incoming peers. Should return true if peer
   # is allowed to connect.
diff --git a/eth/utp/utp_socket.nim b/eth/utp/utp_socket.nim
index 2fe6be4..8223323 100644
--- a/eth/utp/utp_socket.nim
+++ b/eth/utp/utp_socket.nim
@@ -1810,10 +1810,10 @@ proc closeWait*(socket: UtpSocket) {.async: (raises: [CancelledError]).} =
   socket.close()
   await socket.closeEvent.wait()
 
-proc write*(socket: UtpSocket, data: seq[byte]): Future[WriteResult] =
+proc write*(socket: UtpSocket, data: seq[byte]): Future[WriteResult] {.async: (raw: true, raises: [CancelledError]).} =
   debug "Write data", dst = socket.socketKey, length = len(data)
 
-  let retFuture = newFuture[WriteResult]("UtpSocket.write")
+  let retFuture = Future[WriteResult].Raising([CancelledError]).init("utp_socket.write")
 
   if (socket.state != Connected):
     let res = WriteResult.err(
@@ -1842,13 +1842,13 @@ proc write*(socket: UtpSocket, data: seq[byte]): Future[WriteResult] =
     # this should not happen as out write queue is unbounded
     raiseAssert e.msg
 
-  return retFuture
+  retFuture
 
-proc read*(socket: UtpSocket, n: Natural): Future[seq[byte]] =
-  ## Read all bytes from socket ``socket``.
+proc read*(socket: UtpSocket, n: Natural): Future[seq[byte]] {.async: (raw: true, raises: [CancelledError]).} =
+  ## Read n bytes from socket ``socket``.
   ##
   ## This procedure allocates buffer seq[byte] and return it as result.
-  let fut = newFuture[seq[uint8]]()
+  let fut = Future[seq[uint8]].Raising([CancelledError]).init("utp_socket.read")
 
   if socket.readingClosed():
     fut.complete(newSeq[uint8]())
@@ -1864,16 +1864,16 @@ proc read*(socket: UtpSocket, n: Natural): Future[seq[byte]] =
           reader: fut))
     )
   except AsyncQueueFullError as e:
-        # should not happen as our write queue is unbounded
-        raiseAssert e.msg
+    # should not happen as our write queue is unbounded
+    raiseAssert e.msg
 
-  return fut
+  fut
 
-proc read*(socket: UtpSocket): Future[seq[byte]] =
+proc read*(socket: UtpSocket): Future[seq[byte]] {.async: (raw: true, raises: [CancelledError]).} =
   ## Read all bytes from socket ``socket``.
   ##
   ## This procedure allocates buffer seq[byte] and return it as result.
-  let fut = newFuture[seq[uint8]]()
+  let fut = Future[seq[uint8]].Raising([CancelledError]).init("utp_socket.read")
 
   if socket.readingClosed():
     fut.complete(newSeq[uint8]())
@@ -1892,7 +1892,7 @@ proc read*(socket: UtpSocket): Future[seq[byte]] =
         # should not happen as our write queue is unbounded
         raiseAssert e.msg
 
-  return fut
+  fut
 
 # Check how many packets are still in the out going buffer, usefully for tests
 # or debugging.
diff --git a/tests/utp/test_discv5_protocol.nim b/tests/utp/test_discv5_protocol.nim
index a129bc3..3df0342 100644
--- a/tests/utp/test_discv5_protocol.nim
+++ b/tests/utp/test_discv5_protocol.nim
@@ -25,8 +25,10 @@ procSuite "uTP over discovery v5 protocol":
 
   proc registerIncomingSocketCallback(serverSockets: AsyncQueue): AcceptConnectionCallback[NodeAddress] =
     return (
-      proc(server: UtpRouter[NodeAddress], client: UtpSocket[NodeAddress]): Future[void] =
-        serverSockets.addLast(client)
+      proc(
+          server: UtpRouter[NodeAddress], client: UtpSocket[NodeAddress]
+      ): Future[void] {.async: (raw: true, raises: []).} =
+        noCancel serverSockets.addLast(client)
     )
 
   proc allowOneIdCallback(allowedId: uint16): AllowConnectionCallback[NodeAddress] =
@@ -67,9 +69,11 @@ procSuite "uTP over discovery v5 protocol":
     await node1.closeWait()
     await node2.closeWait()
 
-  proc cbUserData(server: UtpRouter[NodeAddress], client: UtpSocket[NodeAddress]): Future[void] =
+  proc cbUserData(
+      server: UtpRouter[NodeAddress], client: UtpSocket[NodeAddress]
+  ): Future[void] {.async: (raw: true, raises: []).} =
     let queue = rt.getUserData[NodeAddress, AsyncQueue[UtpSocket[NodeAddress]]](server)
-    queue.addLast(client)
+    noCancel queue.addLast(client)
 
   asyncTest "Provide user data pointer and use it in callback":
     let
@@ -249,20 +253,20 @@ procSuite "uTP over discovery v5 protocol":
     proc handleIncomingConnection(
         server: UtpRouter[NodeAddress],
         client: UtpSocket[NodeAddress]
-      ): Future[void] =
+      ): Future[void] {.async: (raw: true, raises: []).} =
       readFutures.add(client.readAndCheck())
 
       var fut = newFuture[void]("test.AcceptConnectionCallback")
       fut.complete()
-      return fut
+      noCancel fut
 
     proc handleIncomingConnectionDummy(
         server: UtpRouter[NodeAddress],
         client: UtpSocket[NodeAddress]
-      ): Future[void] =
+      ): Future[void] {.async: (raw: true, raises: []).} =
         var fut = newFuture[void]("test.AcceptConnectionCallback")
         fut.complete()
-        return fut
+        noCancel fut
 
     let
       address1 = localAddress(20302)
diff --git a/tests/utp/test_protocol.nim b/tests/utp/test_protocol.nim
index aaf2b51..a6d26ed 100644
--- a/tests/utp/test_protocol.nim
+++ b/tests/utp/test_protocol.nim
@@ -19,8 +19,10 @@ proc setAcceptedCallback(
     event: AsyncEvent
   ): AcceptConnectionCallback[TransportAddress] =
   return (
-    proc(server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]): Future[void] =
-      let fut = newFuture[void]()
+    proc(
+        server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]
+    ): Future[void] {.async: (raw: true, raises: []).} =
+      let fut = noCancel Future[void].Raising([CancelledError]).init("test.AcceptConnectionCallback")
       event.fire()
       fut.complete()
       fut
@@ -30,8 +32,10 @@ proc registerIncomingSocketCallback(
     serverSockets: AsyncQueue
   ): AcceptConnectionCallback[TransportAddress] =
   return (
-    proc(server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]): Future[void] =
-      serverSockets.addLast(client)
+    proc(
+        server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]
+    ): Future[void]  {.async: (raw: true, raises: []).}=
+      noCancel serverSockets.addLast(client)
   )
 
 proc allowOneIdCallback(
@@ -165,9 +169,9 @@ procSuite "uTP over UDP protocol":
   asyncTest "Connect to remote host: test udata pointer and use it in callback":
     proc cbUserData(
         server: UtpRouter[TransportAddress],
-        client: UtpSocket[TransportAddress]): Future[void] =
+        client: UtpSocket[TransportAddress]): Future[void] {.async: (raw: true, raises: []).} =
       let q = getUserData[TransportAddress, AsyncQueue[UtpSocket[TransportAddress]]](server)
-      q.addLast(client)
+      noCancel q.addLast(client)
 
     let
       incomingConnections1 = newAsyncQueue[UtpSocket[TransportAddress]]()
@@ -565,20 +569,20 @@ procSuite "uTP over UDP protocol":
     proc handleIncomingConnection(
         server: UtpRouter[TransportAddress],
         client: UtpSocket[TransportAddress]
-      ): Future[void] =
+      ): Future[void] {.async: (raw: true, raises: []).} =
       readFutures.add(client.readAndCheck())
 
       var fut = newFuture[void]("test.AcceptConnectionCallback")
       fut.complete()
-      return fut
+      noCancel fut
 
     proc handleIncomingConnectionDummy(
         server: UtpRouter[TransportAddress],
         client: UtpSocket[TransportAddress]
-      ): Future[void] =
+      ): Future[void] {.async: (raw: true, raises: []).} =
         var fut = newFuture[void]("test.AcceptConnectionCallback")
         fut.complete()
-        return fut
+        noCancel fut
 
     let
       address1 = initTAddress("127.0.0.1", 9079)
diff --git a/tests/utp/test_protocol_integration.nim b/tests/utp/test_protocol_integration.nim
index 229e371..a90819c 100644
--- a/tests/utp/test_protocol_integration.nim
+++ b/tests/utp/test_protocol_integration.nim
@@ -1,4 +1,4 @@
-# Copyright (c) 2022 Status Research & Development GmbH
+# Copyright (c) 2022-2024 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -32,12 +32,14 @@ proc buildAcceptConnection(
     t: ref Table[UtpSocketKey[TransportAddress], UtpSocket[TransportAddress]]
   ): AcceptConnectionCallback[TransportAddress] =
   return (
-    proc (server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]): Future[void] =
-      let fut = newFuture[void]()
+    proc (
+        server: UtpRouter[TransportAddress], client: UtpSocket[TransportAddress]
+    ): Future[void] {.async: (raw: true, raises: []).} =
+      let fut = noCancel Future[void].Raising([CancelledError]).init("test.AcceptConnectionCallback")
       let key = client.socketKey
       t[key] = client
       fut.complete()
-      return fut
+      fut
   )
 
 proc getServerSocket(
diff --git a/tests/utp/test_utp_router.nim b/tests/utp/test_utp_router.nim
index f9eef8e..7e8a5b7 100644
--- a/tests/utp/test_utp_router.nim
+++ b/tests/utp/test_utp_router.nim
@@ -33,8 +33,8 @@ procSuite "uTP router unit":
 
   proc registerIncomingSocketCallback(serverSockets: AsyncQueue): AcceptConnectionCallback[int] =
     return (
-      proc(server: UtpRouter[int], client: UtpSocket[int]): Future[void] =
-        serverSockets.addLast(client)
+      proc(server: UtpRouter[int], client: UtpSocket[int]): Future[void] {.async: (raw: true, raises: []).} =
+        noCancel serverSockets.addLast(client)
     )
 
   proc testSend(to: int, bytes: seq[byte]) =