diff --git a/libp2p/transports/wstransport.nim b/libp2p/transports/wstransport.nim
index 1bb86c4afb..dd42a10fd9 100644
--- a/libp2p/transports/wstransport.nim
+++ b/libp2p/transports/wstransport.nim
@@ -27,7 +27,8 @@ import transport,
        ../utility,
        ../stream/connection,
        ../upgrademngrs/upgrade,
-       websock/websock
+       websock/websock,
+       bearssl/rand
 
 logScope:
   topics = "libp2p wstransport"
@@ -111,7 +112,7 @@ type
     flags: set[ServerFlags]
     handshakeTimeout: Duration
     factories: seq[ExtFactory]
-    rng: Rng
+    rng: ref HmacDrbgContext
 
 proc secure*(self: WsTransport): bool =
   not (isNil(self.tlsPrivateKey) or isNil(self.tlsCertificate))
@@ -327,7 +328,7 @@ proc new*(
   tlsFlags: set[TLSFlags] = {},
   flags: set[ServerFlags] = {},
   factories: openArray[ExtFactory] = [],
-  rng: Rng = nil,
+  rng: ref HmacDrbgContext = nil,
   handshakeTimeout = DefaultHeadersTimeout): T {.public.} =
   ## Creates a secure WebSocket transport
 
@@ -346,7 +347,7 @@ proc new*(
   upgrade: Upgrade,
   flags: set[ServerFlags] = {},
   factories: openArray[ExtFactory] = [],
-  rng: Rng = nil,
+  rng: ref HmacDrbgContext = nil,
   handshakeTimeout = DefaultHeadersTimeout): T {.public.} =
   ## Creates a clear-text WebSocket transport