diff --git a/bin/cli.js b/bin/cli.js
index b12564f..cb0db39 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -100,7 +100,7 @@ async function main() {
 
   if (serverOk) {
     try {
-      if (!process.env.MCP_AUTO_OPEN_DISABLED) {
+      if (process.env.MCP_AUTO_OPEN_DISABLED !== "true") {
         open(`http://127.0.0.1:${CLIENT_PORT}`);
       }
       await spawnPromise("node", [inspectorClientPath], {