diff --git a/scripts/publish-release.ps1 b/scripts/publish-release.ps1
index 2b2295e..7cae953 100644
--- a/scripts/publish-release.ps1
+++ b/scripts/publish-release.ps1
@@ -111,15 +111,23 @@ $AuthHeader = "Authorization: token $Token"
 # ZIP Asset hochladen
 Write-Host "Lade sanctum-$TagName-windows-x86_64.zip hoch..." -ForegroundColor Cyan
 $ZipPathNorm = $ZipFile.Replace('\', '/')
-$ZipUrl = "$UploadUrl?name=sanctum-$TagName-windows-x86_64.zip"
-$ZipResult = & curl.exe -s -X POST $ZipUrl -H $AuthHeader -F "attachment=@$ZipPathNorm"
+$ZipUrl = "${UploadUrl}?name=sanctum-$TagName-windows-x86_64.zip"
+$ZipResult = & curl.exe -sS -X POST $ZipUrl -H $AuthHeader -F "attachment=@$ZipPathNorm"
+if ($LASTEXITCODE -ne 0) {
+    Write-Error "Upload von sanctum-$TagName-windows-x86_64.zip fehlgeschlagen: $ZipResult"
+    exit 1
+}
 Write-Host "[OK] sanctum-$TagName-windows-x86_64.zip hochgeladen." -ForegroundColor Green
 
 # SHA256SUMS.txt hochladen
 Write-Host "Lade SHA256SUMS.txt hoch..." -ForegroundColor Cyan
 $SumPathNorm = $ChecksumFile.Replace('\', '/')
-$SumUrl = "$UploadUrl?name=SHA256SUMS.txt"
-$SumResult = & curl.exe -s -X POST $SumUrl -H $AuthHeader -F "attachment=@$SumPathNorm"
+$SumUrl = "${UploadUrl}?name=SHA256SUMS.txt"
+$SumResult = & curl.exe -sS -X POST $SumUrl -H $AuthHeader -F "attachment=@$SumPathNorm"
+if ($LASTEXITCODE -ne 0) {
+    Write-Error "Upload von SHA256SUMS.txt fehlgeschlagen: $SumResult"
+    exit 1
+}
 Write-Host "[OK] SHA256SUMS.txt hochgeladen." -ForegroundColor Green
 
 # Standalone EXE hochladen
@@ -127,8 +135,12 @@ $ExeFile = Join-Path $ProjectRoot "target\release\sanctum.exe"
 if (Test-Path $ExeFile) {
     Write-Host "Lade sanctum.exe hoch..." -ForegroundColor Cyan
     $ExePathNorm = $ExeFile.Replace('\', '/')
-    $ExeUrl = "$UploadUrl?name=sanctum.exe"
-    $ExeResult = & curl.exe -s -X POST $ExeUrl -H $AuthHeader -F "attachment=@$ExePathNorm"
+    $ExeUrl = "${UploadUrl}?name=sanctum.exe"
+    $ExeResult = & curl.exe -sS -X POST $ExeUrl -H $AuthHeader -F "attachment=@$ExePathNorm"
+    if ($LASTEXITCODE -ne 0) {
+        Write-Error "Upload von sanctum.exe fehlgeschlagen: $ExeResult"
+        exit 1
+    }
     Write-Host "[OK] sanctum.exe hochgeladen." -ForegroundColor Green
 }