diff --git a/.github/workflows/build_orca.yml b/.github/workflows/build_orca.yml
index 33e30f1a86..2846eff1d5 100644
--- a/.github/workflows/build_orca.yml
+++ b/.github/workflows/build_orca.yml
@@ -157,11 +157,6 @@ jobs:
         run: |
           choco install nsis
 
-      - name: Check signtool.exe
-        if: matrix.os == 'windows-2019'
-        run: |
-          "C:/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/signtool.exe/signtool.exe"
-
       - name: download deps
         if: matrix.os == 'windows-2019'
         shell: powershell
@@ -205,6 +200,7 @@ jobs:
 
       - name: Create installer Win
         if: matrix.os == 'windows-2019'
+        shell: pwsh
         env:
           BUILD_CERTIFICATE_BASE64: ${{ secrets.BUILD_CERTIFICATE_BASE64 }}
           P12_PASSWORD: ${{ secrets.P12_PASSWORD }}
@@ -213,12 +209,13 @@ jobs:
           # Decode the certificate
           echo "$BUILD_CERTIFICATE_BASE64" | base64 -d > certificate.p12
           # Sign all .exe and .dll files in the specified folder
-          for file in OrcaSlicer/*; do
-            if [[ $file == *.exe ]] || [[ $file == *.dll ]]; then
-              "C:/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/signtool.exe/signtool.exe" sign /fd sha256 /f certificate.p12 /p $P12_PASSWORD  "$file"
-            fi
-          done
+          # Decode the certificate
+          [System.Convert]::FromBase64String($env:BUILD_CERTIFICATE_BASE64) | Set-Content -AsByteStream -Path certificate.p12
+          Get-ChildItem -Path OrcaSlicer -Include *.exe,*.dll -Recurse | ForEach-Object {
+            & "C:/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/signtool.exe" sign /fd sha256 /f certificate.p12 /p $env:P12_PASSWORD $_.FullName
+          }
           cpack -G NSIS
+          ls "${{ github.workspace }}/build"
           "C:/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/signtool.exe/signtool.exe" sign /fd sha256 /f certificate.p12 /p $P12_PASSWORD  "${{ github.workspace }}/build/OrcaSlicer_Windows_Installer_${{ env.ver }}.exe"
 
       # - name: pack app