diff --git a/README.md b/README.md
index be8621e..5e2fba1 100644
--- a/README.md
+++ b/README.md
@@ -104,14 +104,14 @@ To bypass authentication, or to emit custom headers on all requests to your remo
       ]
 ```
 
-* To change which host `mcp-remote` registers as the OAuth callback URL (by default `127.0.0.1`), add the `--host` flag.
+* To change which host `mcp-remote` registers as the OAuth callback URL (by default `localhost`), add the `--host` flag.
 
 ```json
       "args": [
         "mcp-remote",
         "https://remote.mcp.server/sse",
         "--host",
-        "localhost"
+        "127.0.0.1"
       ]
 ```
 
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index ac32313..45ec8fd 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -450,7 +450,7 @@ export async function parseCommandLineArgs(args: string[], usage: string) {
   }
 
   // Parse host
-  let host = '127.0.0.1' // Default
+  let host = 'localhost' // Default
   const hostIndex = args.indexOf('--host')
   if (hostIndex !== -1 && hostIndex < args.length - 1) {
     host = args[hostIndex + 1]