diff --git a/src/gui/ElevatorPanel.java b/src/gui/ElevatorPanel.java
index 71cbdf8..8c9fd8a 100644
--- a/src/gui/ElevatorPanel.java
+++ b/src/gui/ElevatorPanel.java
@@ -4,6 +4,7 @@ import java.awt.*;
 import java.awt.event.*;
 
 
+@SuppressWarnings("serial")
 class ElevatorPanel extends JPanel {
 	private JButton emergencyStop = new JButton("Emergency stop.");
 	private JButton[] buttons;
diff --git a/src/gui/FloorPanels.java b/src/gui/FloorPanels.java
index 25e58c6..3c54ef6 100644
--- a/src/gui/FloorPanels.java
+++ b/src/gui/FloorPanels.java
@@ -4,6 +4,7 @@ import java.awt.*;
 import java.awt.event.*;
 
 
+@SuppressWarnings("serial")
 class FloorPanels extends JPanel {
 	private int nbFloors;
 	private JPanel[] floors;