diff --git a/src/frames/IMainFrame.java b/src/frames/IMainFrame.java
index 678a2b1..6cf26ab 100644
--- a/src/frames/IMainFrame.java
+++ b/src/frames/IMainFrame.java
@@ -1,10 +1,8 @@
 package frames;
 
-import javax.swing.JPanel;
-
 // -------------------------------------------------------------------------
 //
 public interface IMainFrame {
-	void showMainPanel(JPanel nowPanel);
-	void showHistoryPanel(JPanel nowPanel, int index);
+	void showMainPanel();
+	void showHistoryPanel(int index);
 }