diff --git a/PCK-Studio/MainForm.cs b/PCK-Studio/MainForm.cs
index 760c5c96..4508f1c4 100644
--- a/PCK-Studio/MainForm.cs
+++ b/PCK-Studio/MainForm.cs
@@ -86,7 +86,7 @@ namespace PckStudio
 
         private bool TryOpenPck(string filepath, out PackInfo packInfo)
         {
-            if (!File.Exists(filepath) || !filepath.EndsWith(".pck"))
+            if (!File.Exists(filepath))
             {
                 packInfo = PackInfo.Empty;
                 return false;
@@ -127,7 +127,7 @@ namespace PckStudio
 
         private void AddEditorPage(string filepath)
         {
-            if (!File.Exists(filepath) && !filepath.EndsWith(".pck"))
+            if (!File.Exists(filepath))
             {
                 Trace.TraceError($"[{nameof(AddEditorPage)}] Invalid filepath({filepath})");
                 return;
diff --git a/PCK-Studio/Program.cs b/PCK-Studio/Program.cs
index 5d11a7d5..3aa66369 100644
--- a/PCK-Studio/Program.cs
+++ b/PCK-Studio/Program.cs
@@ -38,7 +38,7 @@ namespace PckStudio
             Updater.SetOwner(MainInstance);
             if (args.Length > 0)
             {
-                MainInstance.LoadPckFromFile(args.Where(arg => File.Exists(arg) && arg.EndsWith(".pck")));
+                MainInstance.LoadPckFromFile(args.Where(arg => File.Exists(arg)));
             }
             Application.ApplicationExit += (sender, e) => { RPC.Deinitialize(); };
             MainInstance.FocusMe();