diff --git a/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java b/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
index 8e88a54c9..8fe481099 100644
--- a/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
+++ b/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
@@ -92,6 +92,7 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 public class DesignerFrame extends JFrame implements JTemplateActionListener, TargetModifiedListener {
 
@@ -107,7 +108,7 @@ public class DesignerFrame extends JFrame implements JTemplateActionListener, Ta
 
     private static final Integer TOP_LAYER = 200;
 
-    private List<DesignerOpenedListener> designerOpenedListenerList = new ArrayList<>();
+    private List<DesignerOpenedListener> designerOpenedListenerList = new CopyOnWriteArrayList<>();
 
     private ToolBarMenuDock ad;