diff --git a/OpenKh.Command.Bbsa/Program.cs b/OpenKh.Command.Bbsa/Program.cs
index 62cdb91bc..5ee8c061e 100644
--- a/OpenKh.Command.Bbsa/Program.cs
+++ b/OpenKh.Command.Bbsa/Program.cs
@@ -49,7 +49,7 @@ private class ExtractCommand
         {
             [Required]
             [DirectoryExists]
-            [Option(CommandOptionType.SingleValue, Description = "Required. Path where the various BBSAx.DAT files are located", ShortName = "i", LongName = "input")]
+            [Argument(0, Description = "Required. Path where the various BBSAx.DAT files are located")]
             public string InputPath { get; set; }
 
             [Option(CommandOptionType.SingleValue, Description = "Path where the content will be extracted", ShortName = "o", LongName = "output")]
@@ -105,7 +105,7 @@ private class ListCommand
         {
             [Required]
             [DirectoryExists]
-            [Option(CommandOptionType.SingleValue, Description = "Required. Path where the various BBSAx.DAT files are located", ShortName = "i", LongName = "input")]
+            [Argument(0, Description = "Required. Path where the various BBSAx.DAT files are located")]
             public string InputPath { get; set; }
 
             [Option(CommandOptionType.SingleValue, Description = "Archive file name prefix. By default it is 'BBS'.", ShortName = "p", LongName = "prefix")]
diff --git a/OpenKh.Command.IdxImg/Program.cs b/OpenKh.Command.IdxImg/Program.cs
index c2a9aca3d..792ad7576 100644
--- a/OpenKh.Command.IdxImg/Program.cs
+++ b/OpenKh.Command.IdxImg/Program.cs
@@ -47,7 +47,7 @@ private class ExtractCommand
 
             [Required]
             [FileExists]
-            [Option(CommandOptionType.SingleValue, Description = "Required. Kingdom Hearts II IDX file, paired with a IMG", ShortName = "i", LongName = "idx")]
+            [Argument(0, Description = "Kingdom Hearts II IDX file, paired with a IMG")]
             public string InputIdx { get; set; }
 
             [FileExists]
@@ -126,7 +126,7 @@ private class ListCommand
 
             [Required]
             [FileExists]
-            [Option(CommandOptionType.SingleValue, Description = "Required. Kingdom Hearts II IDX file, paired with a IMG", ShortName = "i", LongName = "idx")]
+            [Argument(0, Description = "Kingdom Hearts II IDX file, paired with a IMG")]
             public string InputIdx { get; set; }
 
             [Option(CommandOptionType.NoValue, Description = "Sort file list by their position in the IMG", ShortName = "s", LongName = "sort")]