diff --git a/lib/index.ts b/lib/index.ts
index 57b924d..ea0e5c8 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -346,7 +346,17 @@ const serialize = (
     clientId,
     transport,
     nsp,
-    handshake: socket.handshake,
+    handshake: {
+      address: socket.handshake.address,
+      headers: socket.handshake.headers,
+      query: socket.handshake.query,
+      issued: socket.handshake.issued,
+      secure: socket.handshake.secure,
+      time: socket.handshake.time,
+      url: socket.handshake.url,
+      xdomain: socket.handshake.xdomain,
+      // ignore auth and other attributes like sessionStore
+    },
     rooms: [...socket.rooms],
   };
 };
diff --git a/test/index.ts b/test/index.ts
index 6c420ee..76ed31e 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -262,7 +262,16 @@ describe("Socket.IO Admin (server instrumentation)", () => {
 
         expect(socket.id).to.eql(serverSocket.id);
         expect(socket.nsp).to.eql("/");
-        expect(socket.handshake).to.eql(serverSocket.handshake);
+        expect(socket.handshake).to.eql({
+          address: serverSocket.handshake.address,
+          headers: serverSocket.handshake.headers,
+          query: serverSocket.handshake.query,
+          issued: serverSocket.handshake.issued,
+          secure: serverSocket.handshake.secure,
+          time: serverSocket.handshake.time,
+          url: serverSocket.handshake.url,
+          xdomain: serverSocket.handshake.xdomain,
+        });
         expect(socket.rooms).to.eql([...serverSocket.rooms]);
 
         // join