diff --git a/server/app.ts b/server/app.ts
index 7a1a51a..174d715 100644
--- a/server/app.ts
+++ b/server/app.ts
@@ -124,6 +124,7 @@ console.info(
 app.use(express.json())
 let sessionObject = {
   store: redisStore,
+  name: 'obp-api-explorer-ii.sid', // CRITICAL: Unique cookie name to prevent conflicts with other apps on localhost
   secret: process.env.VITE_OPB_SERVER_SESSION_PASSWORD,
   resave: false,
   saveUninitialized: false, // Don't save empty sessions (better for authenticated apps)