diff --git a/src/cliproxy/binary/platform-detector.ts b/src/cliproxy/binary/platform-detector.ts
index 9c1d2f9f..1692a356 100644
--- a/src/cliproxy/binary/platform-detector.ts
+++ b/src/cliproxy/binary/platform-detector.ts
@@ -2,7 +2,7 @@
  * Platform Detector for CLIProxyAPI Binary Downloads
  *
  * Detects OS and architecture to determine correct binary asset.
- * Supports 6 platforms: darwin/linux/windows x amd64/arm64
+ * Supports 6 platforms: darwin/linux/windows x amd64/aarch64
  */
 
 import {
@@ -75,7 +75,7 @@ const OS_MAP: Record<string, SupportedOS | undefined> = {
 
 const ARCH_MAP: Record<string, SupportedArch | undefined> = {
   x64: 'amd64',
-  arm64: 'arm64',
+  arm64: 'aarch64',
 };
 
 /**
@@ -103,7 +103,7 @@ export function detectPlatform(
 
   if (!arch) {
     throw new Error(
-      `Unsupported CPU architecture: ${nodeArch}\n` + `Supported: x64 (amd64), arm64`
+      `Unsupported CPU architecture: ${nodeArch}\n` + `Supported: x64 (amd64), arm64 (aarch64)`
     );
   }
 
@@ -195,7 +195,7 @@ export function isPlatformSupported(): boolean {
 
 /**
  * Get human-readable platform description
- * @returns Description string (e.g., "macOS arm64")
+ * @returns Description string (e.g., "macOS aarch64")
  */
 export function getPlatformDescription(): string {
   try {
diff --git a/src/cliproxy/types/__tests__/types-backward-compat.test.ts b/src/cliproxy/types/__tests__/types-backward-compat.test.ts
index 5ee676ad..9d38736b 100644
--- a/src/cliproxy/types/__tests__/types-backward-compat.test.ts
+++ b/src/cliproxy/types/__tests__/types-backward-compat.test.ts
@@ -34,7 +34,7 @@ import { PLUS_ONLY_PROVIDERS } from '../../types';
 describe('types.ts backward compatibility', () => {
   it('exports all platform types', () => {
     const os: SupportedOS = 'darwin';
-    const arch: SupportedArch = 'arm64';
+    const arch: SupportedArch = 'aarch64';
     const ext: ArchiveExtension = 'tar.gz';
     const info: PlatformInfo = {
       os,
@@ -43,7 +43,7 @@ describe('types.ts backward compatibility', () => {
       extension: ext,
     };
     expect(info.os).toBe('darwin');
-    expect(info.arch).toBe('arm64');
+    expect(info.arch).toBe('aarch64');
   });
 
   it('exports all binary types', () => {
diff --git a/src/cliproxy/types/platform-types.ts b/src/cliproxy/types/platform-types.ts
index 0fdd0f65..e05646c7 100644
--- a/src/cliproxy/types/platform-types.ts
+++ b/src/cliproxy/types/platform-types.ts
@@ -6,7 +6,7 @@
 export type SupportedOS = 'darwin' | 'linux' | 'windows';
 
 /** Supported CPU architectures */
-export type SupportedArch = 'amd64' | 'arm64';
+export type SupportedArch = 'amd64' | 'aarch64';
 
 /** Archive extension based on platform */
 export type ArchiveExtension = 'tar.gz' | 'zip';