diff --git a/install-claude-code.ps1 b/install-claude-code.ps1
index db92ce7..51e84f5 100644
--- a/install-claude-code.ps1
+++ b/install-claude-code.ps1
@@ -44,18 +44,32 @@ function Main {
     Write-Info "===== Claude Code install script (Windows PowerShell) ====="
     Write-Info "Installing Claude Code (command-line AI assistant) natively..."
 
-    try {
-        Write-Info "Fetching and executing official installer from: https://claude.ai/install.ps1"
+    $tmpDir = Join-Path $env:TEMP "claude_install_$(Get-Random)"
+    New-Item -ItemType Directory -Path $tmpDir -Force | Out-Null
+    $scriptPath = Join-Path $tmpDir "bootstrap.ps1"
 
-        # Anthropic 공식 설치 ps1 스크립트를 다운로드 및 메모리 상에서 직접 호출 가동
-        $installerScript = Invoke-RestMethod -Uri "https://claude.ai/install.ps1" -UseBasicParsing
-        Invoke-Expression $installerScript
+    try {
+        Write-Info "Downloading official installer from: https://downloads.claude.ai/claude-code-releases/bootstrap.ps1"
+        $ProgressPreference = 'SilentlyContinue'
+        Invoke-WebRequest -Uri "https://downloads.claude.ai/claude-code-releases/bootstrap.ps1" -OutFile $scriptPath -UseBasicParsing
+        $ProgressPreference = 'Continue'
+
+        if (-not (Test-Path $scriptPath)) {
+            Write-Err "Failed to download official Claude Code bootstrap installer."
+        }
+
+        Write-Info "Executing official Claude Code installer..."
+        & $scriptPath
 
         Write-Success "Claude Code has been successfully installed!"
         Write-Info "Please restart your terminal window or refresh your PATH environment variable."
         Write-Info "Run command: claude"
     } catch {
         Write-Err "Failed to install Claude Code: $_"
+    } finally {
+        if (Test-Path $tmpDir) {
+            Remove-Item -Path $tmpDir -Recurse -Force -ErrorAction SilentlyContinue
+        }
     }
 }