diff --git a/.changeset/update-third-party-source-note.md b/.changeset/update-third-party-source-note.md
new file mode 100644
index 0000000000..1931f0b911
--- /dev/null
+++ b/.changeset/update-third-party-source-note.md
@@ -0,0 +1,5 @@
+---
+"@moonshot-ai/kimi-code": patch
+---
+
+Add a reminder for third-party install sources to use the official installer in the update prompt.
diff --git a/README.md b/README.md
index d17d143e34..e3e17adb8c 100644
--- a/README.md
+++ b/README.md
@@ -19,12 +19,6 @@ Install with the official script. No Node.js required.
 curl -fsSL https://code.kimi.com/kimi-code/install.sh | bash
 ```
 
-- **Homebrew (macOS/Linux)**:
-
-```sh
-brew install kimi-code
-```
-
 - **Windows (PowerShell)**:
 
 ```powershell
diff --git a/README.zh-CN.md b/README.zh-CN.md
index e60fd158e5..cf583f9b85 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -22,12 +22,6 @@ Kimi Code CLI 是一个运行在终端里的 AI 编程 agent，可以帮你读
 curl -fsSL https://code.kimi.com/kimi-code/install.sh | bash
 ```
 
-- **Homebrew（macOS / Linux）**：
-
-```sh
-brew install kimi-code
-```
-
 - **Windows（PowerShell）**：
 
 ```powershell
diff --git a/apps/kimi-code/src/cli/update/preflight.ts b/apps/kimi-code/src/cli/update/preflight.ts
index 5fda96d6ae..098899035c 100644
--- a/apps/kimi-code/src/cli/update/preflight.ts
+++ b/apps/kimi-code/src/cli/update/preflight.ts
@@ -4,6 +4,7 @@ import { log, type Logger } from '@moonshot-ai/kimi-code-sdk';
 import type { TelemetryProperties } from '@moonshot-ai/kimi-telemetry';
 
 import {
+  KIMI_CODE_OFFICIAL_INSTALL_URL,
   NATIVE_INSTALL_COMMAND_UNIX,
   NATIVE_INSTALL_COMMAND_WIN,
 } from '#/constant/app';
@@ -141,6 +142,10 @@ function formatErrorMessage(error: unknown): string {
   return error instanceof Error ? error.message : String(error);
 }
 
+const THIRD_PARTY_SOURCE_NOTE =
+  '\nNote: Third-party sources may lag behind the official release.\n' +
+  `For the latest updates, use the official installer: ${KIMI_CODE_OFFICIAL_INSTALL_URL}\n`;
+
 export function renderManualUpdateMessage(
   currentVersion: string,
   target: UpdateTarget,
@@ -169,7 +174,8 @@ export function renderManualUpdateMessage(
     `A newer version of ${NPM_PACKAGE_NAME} is available ` +
     `(${currentVersion} -> ${target.version}).\n` +
     `Detected install source: ${sourceDesc}\n` +
-    `To update manually, run: ${installCommand}\n`
+    `To update manually, run: ${installCommand}\n` +
+    (source === 'homebrew' ? THIRD_PARTY_SOURCE_NOTE : '')
   );
 }
 
diff --git a/apps/kimi-code/src/constant/app.ts b/apps/kimi-code/src/constant/app.ts
index c3a599df95..f09cc600ae 100644
--- a/apps/kimi-code/src/constant/app.ts
+++ b/apps/kimi-code/src/constant/app.ts
@@ -81,6 +81,9 @@ export const KIMI_CODE_PLUGIN_MARKETPLACE_URL = `${KIMI_CODE_CDN_BASE}/plugins/m
 export const KIMI_CODE_PLUGIN_MARKETPLACE_URL_ENV = 'KIMI_CODE_PLUGIN_MARKETPLACE_URL';
 export const KIMI_CODE_INSTALL_SH_URL = `${KIMI_CODE_CDN_BASE}/install.sh`;
 export const KIMI_CODE_INSTALL_PS1_URL = `${KIMI_CODE_CDN_BASE}/install.ps1`;
+// Official download page, referenced by prompt copy that steers users away
+// from third-party install sources.
+export const KIMI_CODE_OFFICIAL_INSTALL_URL = 'https://www.kimi.com/code';
 
 // Native install commands, split by platform. Use these for prompt copy and spawn calls only; do not assemble the strings elsewhere.
 export const NATIVE_INSTALL_COMMAND_UNIX = `curl -fsSL ${KIMI_CODE_INSTALL_SH_URL} | bash`;
diff --git a/apps/kimi-code/test/cli/update/preflight.test.ts b/apps/kimi-code/test/cli/update/preflight.test.ts
index ae6dd3bc03..2f7439f51b 100644
--- a/apps/kimi-code/test/cli/update/preflight.test.ts
+++ b/apps/kimi-code/test/cli/update/preflight.test.ts
@@ -485,6 +485,8 @@ describe('runUpdatePreflight', () => {
     const { stdout, options } = captureOutput();
     await expect(runUpdatePreflight('0.4.0', options)).resolves.toBe('continue');
     expect(stdout.join('')).toContain('brew upgrade kimi-code');
+    expect(stdout.join('')).toContain('Third-party sources may lag behind the official release.');
+    expect(stdout.join('')).toContain('https://www.kimi.com/code');
     expect(promptForInstallChoice).not.toHaveBeenCalled();
     expect(mocks.spawn).not.toHaveBeenCalled();
   });