diff --git a/services/spamshield/src/websocket/alert-server.ts b/services/spamshield/src/websocket/alert-server.ts
index 239dca9..12a961c 100644
--- a/services/spamshield/src/websocket/alert-server.ts
+++ b/services/spamshield/src/websocket/alert-server.ts
@@ -58,6 +58,7 @@ export class AlertServer {
     this.wss = new WebSocketServer({
       port: this.config.port,
       host: this.config.host,
+      maxPayload: 65536, // 64KB limit to prevent memory exhaustion attacks
     });
     
     this.setupWebSocketHandlers();