diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5ce442a..53a028d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -49,7 +49,13 @@ jobs:
         $dlls = dir -Path .\ -Filter "MeshOpt.dll" -Recurse | %{$_.FullName}
         foreach ($dll in $dlls)
         {
-          C:\Program Files (x86)\Windows Kits\10\bin\x64\signtool.exe sign /f "credentials.pfx" /p ${{ secrets.EVERSE_CERTIFICATE_KEY }} /t http://timestamp.digicert.com "$dll"
+          $signtool = "C:\Program Files (x86)\Windows Kits\10\bin\x64\signtool.exe"
+          if (Test-Path $signtool) {
+            Write-Error "Foundound"
+          } else {
+            Write-Error "Signtool not found"
+          }
+          "C:\Program Files (x86)\Windows Kits\10\bin\x64\signtool.exe" sign /f "credentials.pfx" /p ${{ secrets.EVERSE_CERTIFICATE_KEY }} /t http://timestamp.digicert.com "$dll"
           Write-Host $dll
         }