diff --git a/ReplayFile/CommandChunk.cs b/ReplayFile/CommandChunk.cs
index 2a6d0e5..b18336b 100644
--- a/ReplayFile/CommandChunk.cs
+++ b/ReplayFile/CommandChunk.cs
@@ -136,7 +136,7 @@ namespace AnotherReplayReader.ReplayFile
 
         public static string GetCommandName(byte commandId)
         {
-            return _commandNames.TryGetValue(commandId, out var storedName) ? storedName : $"（未知指令 0x{commandId:2X}）";
+            return _commandNames.TryGetValue(commandId, out var storedName) ? storedName : $"（未知指令 0x{commandId:X2}）";
         }
 
         public static void UnknownCommandParser(BinaryReader current, byte commandId)