diff --git a/src/lib/common-ui.module.ts b/src/lib/common-ui.module.ts
index 758c263..a0b52f2 100644
--- a/src/lib/common-ui.module.ts
+++ b/src/lib/common-ui.module.ts
@@ -4,7 +4,7 @@ import { MatIconModule } from '@angular/material/icon';
 import { TranslateModule } from '@ngx-translate/core';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { SortByPipe } from './sorting';
-import { BaseAppConfig, CapitalizePipe, HumanizePipe } from './utils';
+import { BaseAppConfig, CapitalizePipe, CommonUiOptions, HumanizePipe, ModuleWithOptions } from './utils';
 import {
     HiddenActionComponent,
     LogoComponent,
@@ -33,11 +33,8 @@ import { DragDropFileUploadDirective } from './upload-file/drag-drop-file-upload
 import { MatProgressBarModule } from '@angular/material/progress-bar';
 import { ConfirmationDialogComponent } from './dialog';
 import { MatTooltipModule } from '@angular/material/tooltip';
-import { CommonUiOptions } from './utils/types/common-ui-options';
-import { BaseUserPreferenceService } from './services';
-import { BaseConfigService } from './services/base-config.service';
+import { BaseConfigService, BaseUserPreferenceService } from './services';
 import { DefaultUserPreferenceService } from './services/default-user-preference.service';
-import { ModuleWithOptions } from './utils/module-with-options';
 
 const matModules = [
     MatIconModule,
@@ -103,7 +100,7 @@ export class CommonUiModule extends ModuleWithOptions {
         };
     }
 
-    private static _getConfigServiceProviders(configServiceFactory: () => unknown, configService: unknown) {
+    private static _getConfigServiceProviders(configServiceFactory: () => unknown, configService?: unknown) {
         if (configService) {
             return [
                 {