diff --git a/csharp/App/Backend/DataTypes/Methods/Installation.cs b/csharp/App/Backend/DataTypes/Methods/Installation.cs
index e27b3be67..f3ec67b80 100644
--- a/csharp/App/Backend/DataTypes/Methods/Installation.cs
+++ b/csharp/App/Backend/DataTypes/Methods/Installation.cs
@@ -62,7 +62,7 @@ public static class InstallationMethods
             .WithArguments(new[]
             {
                 "Resources/s3cmd.py", "rb", $"s3://{installation.Id}-{salt}", "--access_key",
-                apiKey
+                apiKey, "--secret_key", secret
             });
         var x = await cmd.ExecuteBufferedAsync();
         return x.ExitCode == 0;