diff --git a/README.md b/README.md
index 01920382..b0e18deb 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ npx @modelcontextprotocol/inspector -e KEY=value -e KEY2=$VALUE2 node build/inde
 npx @modelcontextprotocol/inspector -e KEY=$VALUE -- node build/index.js -e server-flag
 ```
 
-The inspector runs both an MCP Inspector (MCPI) client UI (default port 6274) and an MCP Proxy (MPCP) server (default port 6727). Open the MCPI client UI in your browser to use the inspector. (These ports are derived from the T9 dialpad mapping of MCPI and MPCP respectively, as a mnemonic). You can customize the ports if needed:
+The inspector runs both an MCP Inspector (MCPI) client UI (default port 6274) and an MCP Proxy (MCPP) server (default port 6277). Open the MCPI client UI in your browser to use the inspector. (These ports are derived from the T9 dialpad mapping of MCPI and MCPP respectively, as a mnemonic). You can customize the ports if needed:
 
 ```bash
 CLIENT_PORT=8080 SERVER_PORT=9000 npx @modelcontextprotocol/inspector node build/index.js
diff --git a/bin/cli.js b/bin/cli.js
index b495f7b4..460ce58e 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -62,7 +62,7 @@ async function main() {
   );
 
   const CLIENT_PORT = process.env.CLIENT_PORT ?? "6274";
-  const SERVER_PORT = process.env.SERVER_PORT ?? "6727";
+  const SERVER_PORT = process.env.SERVER_PORT ?? "6277";
 
   console.log("Starting MCP inspector...");
 
@@ -100,7 +100,7 @@ async function main() {
 
   // Make sure our server/client didn't immediately fail
   await Promise.any([server, client, delay(2 * 1000)]);
-  const portParam = SERVER_PORT === "6727" ? "" : `?proxyPort=${SERVER_PORT}`;
+  const portParam = SERVER_PORT === "6277" ? "" : `?proxyPort=${SERVER_PORT}`;
   console.log(
     `\n🔍 MCP Inspector is up and running at http://127.0.0.1:${CLIENT_PORT}${portParam} 🚀`,
   );
diff --git a/client/src/App.tsx b/client/src/App.tsx
index f65bdc29..23c508f2 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -49,7 +49,7 @@ import { DEFAULT_INSPECTOR_CONFIG } from "./lib/constants";
 import { InspectorConfig } from "./lib/configurationTypes";
 
 const params = new URLSearchParams(window.location.search);
-const PROXY_PORT = params.get("proxyPort") ?? "6727";
+const PROXY_PORT = params.get("proxyPort") ?? "6277";
 const PROXY_SERVER_URL = `http://${window.location.hostname}:${PROXY_PORT}`;
 const CONFIG_LOCAL_STORAGE_KEY = "inspectorConfig_v1";
 
diff --git a/server/src/index.ts b/server/src/index.ts
index 7a527fc5..fcb82953 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -182,7 +182,7 @@ app.get("/config", (req, res) => {
   }
 });
 
-const PORT = process.env.PORT || 6727;
+const PORT = process.env.PORT || 6277;
 
 try {
   const server = app.listen(PORT);