diff --git a/demos/Lazarus_Linux_QT6/SimpleBrowser/umainform.pas b/demos/Lazarus_Linux_QT6/SimpleBrowser/umainform.pas
index c453dfb1..1193651d 100644
--- a/demos/Lazarus_Linux_QT6/SimpleBrowser/umainform.pas
+++ b/demos/Lazarus_Linux_QT6/SimpleBrowser/umainform.pas
@@ -174,7 +174,7 @@ begin
       FClosing := True;
       Visible  := False;
       Chromium1.CloseBrowser(True);
-      CEFLinkedWindowParent1.Free;
+      FreeAndNil(CEFLinkedWindowParent1);
     end;
 end;
 {%Endregion}
@@ -219,7 +219,8 @@ end;
 
 procedure TMainForm.BrowserSetFocusMsg(Data: PtrInt);
 begin
-  CEFLinkedWindowParent1.SetFocus;
+  if assigned(CEFLinkedWindowParent1) then
+    CEFLinkedWindowParent1.SetFocus;
 end;
 
 procedure TMainForm.WMMove(var Message: TLMMove);
diff --git a/update_CEF4Delphi.json b/update_CEF4Delphi.json
index 903a04c6..1f91fe6a 100644
--- a/update_CEF4Delphi.json
+++ b/update_CEF4Delphi.json
@@ -2,7 +2,7 @@
   "UpdateLazPackages" : [
     {
       "ForceNotify" : true,
-      "InternalVersion" : 799,
+      "InternalVersion" : 800,
       "Name" : "cef4delphi_lazarus.lpk",
       "Version" : "140.1.14"
     }