diff --git a/install.ps1 b/install.ps1
index eb169c3..d81a628 100644
--- a/install.ps1
+++ b/install.ps1
@@ -37,7 +37,8 @@ $LocalSetFile = Join-Path $ClaudeTarget "settings.local.json"
 $DebugDir     = Join-Path $ClaudeTarget "debug"
 
 # ─── openssl 检测 ────────────────────────────────────
-$opensslCmd = (Get-Command openssl -ErrorAction SilentlyContinue)?.Source
+$cmd = Get-Command openssl -ErrorAction SilentlyContinue
+$opensslCmd = if ($cmd) { $cmd.Source } else { $null }
 if (-not $opensslCmd) {
     $searchPaths = @("C:\Program Files\Git\usr\bin\openssl.exe", "D:\Git\usr\bin\openssl.exe", "D:\Git\mingw64\bin\openssl.exe", "C:\Program Files\Git\mingw64\bin\openssl.exe")
     $opensslCmd = $searchPaths | Where-Object { Test-Path $_ } | Select-Object -First 1