diff --git a/.github/workflows/ci_cd.yml b/.github/workflows/ci_cd.yml
index 1b03e5da..32ff5a36 100644
--- a/.github/workflows/ci_cd.yml
+++ b/.github/workflows/ci_cd.yml
@@ -425,16 +425,26 @@ jobs:
       - name: Sign application
         working-directory: signtool
         run: |
-          $filename = (get-ChildItem installer -recurse | where {$_.name -like "*Setup*"}).Name
-          $jobname = $filename -replace ".{4}$"
-          .\Ansys.SignClient.exe sign `
-            --signUrl https://csign.ansys.com `
-            -r gh_signtool_account `
-            -s '${{ secrets.SIGNTOOL_PWD }}' `
-            -n $jobname `
-            -i installer/$filename `
-            -o installer/$filename
-
+          $files = Get-ChildItem installer -recurse | where {$_.name -like "*Setup*"}
+          foreach ($file in $files) {
+            $filename = $file.Name
+            $filepath = $file.FullName
+            $jobname = $filename -replace "\.exe$"
+            $proc = Start-Process -FilePath ".\SynSign.exe" -ArgumentList @(
+              "sign",
+              "--signUrl", "https://csign.internal.synopsys.com",
+              "-r", "svc-gh_signtool",
+              "-s", '${{ secrets.SIGNTOOL_PWD }}',
+              "-n", $jobname,
+              "-i", $filepath,
+              "-o", $filepath
+            ) -Wait -PassThru
+            $exitCode = if ($null -ne $proc -and $proc.HasExited) { $proc.ExitCode } else { -1 }
+            if ($exitCode -ne 0) {
+              Write-Host "::error::SynSign.exe failed for $filepath with exit code $exitCode"
+              exit 1
+            }
+          }
       - uses: actions/upload-artifact@v7
         with:
           name: Python-Installer-windows-signed