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 3d7fb8c48..73f3254db 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
@@ -71,6 +71,7 @@ import com.fr.start.OemHandler;
 import com.fr.workspace.WorkContext;
 import com.fr.workspace.Workspace;
 import com.fr.workspace.connect.WorkspaceConnectionInfo;
+import java.util.concurrent.CopyOnWriteArrayList;
 import org.jetbrains.annotations.Nullable;
 
 import javax.swing.Icon;
@@ -132,7 +133,7 @@ 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;