diff --git a/src/socket.ts b/src/socket.ts
index 20b6235..410f1fb 100644
--- a/src/socket.ts
+++ b/src/socket.ts
@@ -24,6 +24,9 @@ export default class Socket extends Duplex {
 
   public bufferSize;
 
+  declare readable: true;
+  declare writable: true;
+
   constructor({
     allowHalfOpen = false,
     remoteAddress,