diff --git a/classes/core/AppServiceProvider.php b/classes/core/AppServiceProvider.php
index 1d05a94f59d..6e0a1ff0783 100644
--- a/classes/core/AppServiceProvider.php
+++ b/classes/core/AppServiceProvider.php
@@ -3,23 +3,24 @@
 /**
  * @file classes/core/AppServiceProvider.php
  *
- * Copyright (c) 2014-2021 Simon Fraser University
- * Copyright (c) 2003-2021 John Willinsky
+ * Copyright (c) 2014-2024 Simon Fraser University
+ * Copyright (c) 2003-2024 John Willinsky
  * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
  *
  * @class AppServiceProvider
  *
- * @ingroup core
- *
- * @brief Resolves requests for application classes such as the request handler
- *   to support dependency injection
+ * @brief   Resolves requests for application classes such as the request handler
+ *          to support dependency injection
  */
 
 namespace APP\core;
 
+use APP\services\ContextService;
+use APP\services\NavigationMenuService;
+use APP\services\PublicationFormatService;
+use APP\services\StatsEditorialService;
+use APP\services\StatsPublicationService;
 use PKP\core\PKPRequest;
-use PKP\submissionFile\Collector as SubmissionFileCollector;
-use PKP\submissionFile\SubmissionFile as BaseSubmissionFile;
 
 class AppServiceProvider extends \PKP\core\AppServiceProvider
 {
@@ -32,7 +33,19 @@ public function register()
 
         $this->app->bind(Request::class, PKPRequest::class);
 
-        $this->app->bind(\APP\submissionFile\Collector::class, SubmissionFileCollector::class);
-        $this->app->bind(\APP\submissionFile\SubmissionFile::class, BaseSubmissionFile::class);
+        // Publication Format service
+        $this->app->singleton('publicationFormat', fn ($app) => new PublicationFormatService());
+
+        // Navigation Menu service
+        $this->app->singleton('navigationMenu', fn ($app) => new NavigationMenuService());
+
+        // Context service
+        $this->app->singleton('context', fn ($app) => new ContextService());
+
+        // Publication statistics service
+        $this->app->singleton('publicationStats', fn ($app) => new StatsPublicationService());
+
+        // Editorial statistics service
+        $this->app->singleton('editorialStats', fn ($app) => new StatsEditorialService());
     }
 }
diff --git a/classes/core/Services.php b/classes/core/Services.php
index dd255c97be3..c2434238962 100644
--- a/classes/core/Services.php
+++ b/classes/core/Services.php
@@ -3,30 +3,22 @@
 /**
  * @file classes/core/Services.php
  *
- * Copyright (c) 2014-2021 Simon Fraser University
- * Copyright (c) 2000-2021 John Willinsky
+ * Copyright (c) 2014-2024 Simon Fraser University
+ * Copyright (c) 2000-2024 John Willinsky
  * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
  *
  * @class Services
  *
- * @ingroup core
- *
- * @see Core
- *
  * @brief Pimple Dependency Injection Container.
+ *
+ * @deprecated 3.5.0 Consider using {@see app()->get('SERVICE_NAME')}
+ * @see app()->get('SERVICE_NAME')
  */
 
 namespace APP\core;
 
 class Services extends \PKP\core\PKPServices
 {
-    /**
-     * container initialization
-     */
-    protected function init()
-    {
-        $this->container->register(new \APP\services\OMPServiceProvider());
-    }
 }
 
 if (!PKP_STRICT_MODE) {
diff --git a/classes/publication/Repository.php b/classes/publication/Repository.php
index f36db25be6f..e2344df1a91 100644
--- a/classes/publication/Repository.php
+++ b/classes/publication/Repository.php
@@ -14,7 +14,6 @@
 namespace APP\publication;
 
 use APP\core\Application;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\file\PublicFileManager;
 use APP\monograph\ChapterDAO;
@@ -74,7 +73,7 @@ public function add(Publication $publication): int
             $submission = Repo::submission()->get($publication->getData('submissionId'));
             $submissionContext = $this->request->getContext();
             if ($submissionContext->getId() !== $submission->getData('contextId')) {
-                $submissionContext = Services::get('context')->get($submission->getData('contextId'));
+                $submissionContext = app()->get('context')->get($submission->getData('contextId'));
             }
 
             $supportedLocales = $submission->getPublicationLanguages($submissionContext->getSupportedSubmissionMetadataLocales());
@@ -258,7 +257,7 @@ public function edit(Publication $publication, array $params): Publication
             $submission = Repo::submission()->get($publication->getData('submissionId'));
             $submissionContext = $this->request->getContext();
             if ($submissionContext->getId() !== $submission->getData('contextId')) {
-                $submissionContext = Services::get('context')->get($submission->getData('contextId'));
+                $submissionContext = app()->get('context')->get($submission->getData('contextId'));
             }
 
             foreach ($params['coverImage'] as $localeKey => $newCoverImage) {
@@ -301,7 +300,7 @@ public function publish(Publication $publication)
         if ($submission->getData('currentPublicationId') === $publication->getId()) {
             $context = $this->request->getContext();
             if (!$context || $context->getId() !== $submission->getData('contextId')) {
-                $context = Services::get('context')->get($submission->getData('contextId'));
+                $context = app()->get('context')->get($submission->getData('contextId'));
             }
 
             // Remove publication format tombstones for this publication
@@ -350,7 +349,7 @@ public function unpublish(Publication $publication)
         parent::unpublish($publication);
 
         $submission = Repo::submission()->get($publication->getData('submissionId'));
-        $submissionContext = Services::get('context')->get($submission->getData('contextId'));
+        $submissionContext = app()->get('context')->get($submission->getData('contextId'));
 
         // Create tombstones for this publication
         $publicationFormatTombstoneMgr = new PublicationFormatTombstoneManager();
@@ -384,12 +383,12 @@ public function unpublish(Publication $publication)
     public function delete(Publication $publication)
     {
         $submission = Repo::submission()->get($publication->getData('submissionId'));
-        $context = Services::get('context')->get($submission->getData('contextId'));
+        $context = app()->get('context')->get($submission->getData('contextId'));
 
         // Delete Publication Formats (and all related objects)
         $publicationFormats = $publication->getData('publicationFormats');
         foreach ($publicationFormats as $publicationFormat) {
-            Services::get('publicationFormat')->deleteFormat($publicationFormat, $submission, $context);
+            app()->get('publicationFormat')->deleteFormat($publicationFormat, $submission, $context);
         }
 
         // Delete chapters and assigned chapter authors.
diff --git a/classes/publicationFormat/PublicationFormat.php b/classes/publicationFormat/PublicationFormat.php
index fb7cffdf292..aaf5b88ff55 100644
--- a/classes/publicationFormat/PublicationFormat.php
+++ b/classes/publicationFormat/PublicationFormat.php
@@ -20,7 +20,6 @@
 
 use APP\codelist\ONIXCodelistItemDAO;
 use APP\core\Application;
-use APP\core\Services;
 use APP\facades\Repo;
 use PKP\db\DAORegistry;
 use PKP\db\DAOResultFactory;
@@ -322,7 +321,7 @@ public function getCalculatedFileSize()
 
         foreach ($stageMonographFiles as $monographFile) {
             if ($monographFile->getViewable()) {
-                $fileSize += (int) Services::get('file')->fs->fileSize($monographFile->getData('path'));
+                $fileSize += (int) app()->get('file')->fs->fileSize($monographFile->getData('path'));
             }
         }
 
diff --git a/classes/search/MonographSearch.php b/classes/search/MonographSearch.php
index 52444980b07..b3c988e34f0 100644
--- a/classes/search/MonographSearch.php
+++ b/classes/search/MonographSearch.php
@@ -21,7 +21,6 @@
 
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\press\Press;
 use PKP\db\DAORegistry;
@@ -69,7 +68,7 @@ public function getSparseArray($unorderedResults, $orderBy, $orderDir, $exclude)
                 $filter['dateStart'] = $oneMonthAgo;
                 $filter['dateEnd'] = $today;
             }
-            $rawReport = Services::get('publicationStats')->getTotals($filter);
+            $rawReport = app()->get('publicationStats')->getTotals($filter);
             foreach ($rawReport as $row) {
                 $unorderedResults[$row->submission_id]['metric'] = $row->metric;
             }
diff --git a/classes/services/OMPServiceProvider.php b/classes/services/OMPServiceProvider.php
deleted file mode 100644
index ec6fc9606cc..00000000000
--- a/classes/services/OMPServiceProvider.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-
-/**
- * @file classes/services/OMPServiceProvider.php
- *
- * Copyright (c) 2014-2021 Simon Fraser University
- * Copyright (c) 2000-2021 John Willinsky
- * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
- *
- * @class OMPServiceProvider
- *
- * @ingroup services
- *
- * @brief Utility class to package all OMP services
- */
-
-namespace APP\services;
-
-use Pimple\Container;
-use PKP\services\PKPFileService;
-use PKP\services\PKPSchemaService;
-use PKP\services\PKPSiteService;
-use PKP\services\PKPStatsContextService;
-use PKP\services\PKPStatsGeoService;
-use PKP\services\PKPStatsSushiService;
-
-class OMPServiceProvider implements \Pimple\ServiceProviderInterface
-{
-    /**
-     * Registers services
-     *
-     */
-    public function register(Container $pimple)
-    {
-        // File service
-        $pimple['file'] = function () {
-            return new PKPFileService();
-        };
-
-        // PublicationFormat service
-        $pimple['publicationFormat'] = function () {
-            return new PublicationFormatService();
-        };
-
-        // NavigationMenus service
-        $pimple['navigationMenu'] = function () {
-            return new NavigationMenuService();
-        };
-
-        // Context service
-        $pimple['context'] = function () {
-            return new ContextService();
-        };
-
-        // Schema service
-        $pimple['schema'] = function () {
-            return new PKPSchemaService();
-        };
-
-        // Site service
-        $pimple['site'] = function () {
-            return new PKPSiteService();
-        };
-
-        // Context statistics service
-        $pimple['contextStats'] = function () {
-            return new PKPStatsContextService();
-        };
-
-        // Publication statistics service
-        $pimple['publicationStats'] = function () {
-            return new StatsPublicationService();
-        };
-
-        // Geo statistics service
-        $pimple['geoStats'] = function () {
-            return new PKPStatsGeoService();
-        };
-
-        // SUSHI statistics service
-        $pimple['sushiStats'] = function () {
-            return new PKPStatsSushiService();
-        };
-
-        // Editorial statistics service
-        $pimple['editorialStats'] = function () {
-            return new StatsEditorialService();
-        };
-    }
-}
diff --git a/classes/submission/Submission.php b/classes/submission/Submission.php
index 0ded66e1ce7..6a841e14ba5 100644
--- a/classes/submission/Submission.php
+++ b/classes/submission/Submission.php
@@ -22,7 +22,6 @@
 
 namespace APP\submission;
 
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\publication\Publication;
 use PKP\submission\PKPSubmission;
@@ -56,7 +55,7 @@ public function getSectionId()
      */
     public function _getContextLicenseFieldValue($locale, $field, $publication = null)
     {
-        $context = Services::get('context')->get($this->getData('contextId'));
+        $context = app()->get('context')->get($this->getData('contextId'));
         $fieldValue = null; // Scrutinizer
         switch ($field) {
             case static::PERMISSIONS_FIELD_LICENSE_URL:
diff --git a/classes/sushi/PR.php b/classes/sushi/PR.php
index 8fbe4b1d4ea..adf680055d5 100644
--- a/classes/sushi/PR.php
+++ b/classes/sushi/PR.php
@@ -17,7 +17,6 @@
 
 namespace APP\sushi;
 
-use APP\core\Services;
 use PKP\statistics\PKPStatisticsHelper;
 use PKP\sushi\CounterR5Report;
 
@@ -144,7 +143,7 @@ public function getReportItems(): array
         $params['dateEnd'] = $this->endDate;
         // do not consider metric_type filter now, but for display
 
-        $statsService = Services::get('sushiStats');
+        $statsService = app()->get('sushiStats');
         $metricsQB = $statsService->getQueryBuilder($params);
         $groupBy = [];
         // consider granularity=Month to group the metrics by month
diff --git a/classes/sushi/TR.php b/classes/sushi/TR.php
index 1f71404d0f0..e3e8f53e14f 100644
--- a/classes/sushi/TR.php
+++ b/classes/sushi/TR.php
@@ -17,7 +17,6 @@
 
 namespace APP\sushi;
 
-use APP\core\Services;
 use APP\facades\Repo;
 use PKP\statistics\PKPStatisticsHelper;
 use PKP\sushi\CounterR5Report;
@@ -193,7 +192,7 @@ public function getReportItems(): array
         // do not consider section_type filter now, but later when grouping by submission
         // do not consider metric_type filter now, but for display
 
-        $statsService = Services::get('sushiStats');
+        $statsService = app()->get('sushiStats');
         $metricsQB = $statsService->getQueryBuilder($params);
         // consider attributes to group the metrics by
         $groupBy = ['m.' . PKPStatisticsHelper::STATISTICS_DIMENSION_SUBMISSION_ID];
diff --git a/controllers/grid/catalogEntry/PublicationFormatGridHandler.php b/controllers/grid/catalogEntry/PublicationFormatGridHandler.php
index fd6502ed40c..a2d0d6c927a 100644
--- a/controllers/grid/catalogEntry/PublicationFormatGridHandler.php
+++ b/controllers/grid/catalogEntry/PublicationFormatGridHandler.php
@@ -22,7 +22,6 @@
 use APP\controllers\tab\pubIds\form\PublicIdentifiersForm;
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\log\event\SubmissionEventLogEntry;
 use APP\notification\Notification;
@@ -347,7 +346,7 @@ public function deleteFormat($args, $request)
         }
 
         /** @var PublicationFormatService */
-        $publicationFormatService = Services::get('publicationFormat');
+        $publicationFormatService = app()->get('publicationFormat');
         $publicationFormatService->deleteFormat($representation, $submission, $context);
 
         $currentUser = $request->getUser();
diff --git a/controllers/grid/navigationMenus/form/NavigationMenuItemsForm.php b/controllers/grid/navigationMenus/form/NavigationMenuItemsForm.php
index dba67d27bbc..0b0b0769404 100644
--- a/controllers/grid/navigationMenus/form/NavigationMenuItemsForm.php
+++ b/controllers/grid/navigationMenus/form/NavigationMenuItemsForm.php
@@ -17,7 +17,6 @@
 namespace APP\controllers\grid\navigationMenus\form;
 
 use APP\core\Application;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\section\Section;
 use APP\services\NavigationMenuService;
@@ -35,7 +34,7 @@ class NavigationMenuItemsForm extends PKPNavigationMenuItemsForm
      */
     public function fetch($request, $template = null, $display = false)
     {
-        $customTemplates = Services::get('navigationMenu')->getMenuItemCustomEditTemplates();
+        $customTemplates = app()->get('navigationMenu')->getMenuItemCustomEditTemplates();
 
         $request = Application::get()->getRequest();
         $context = $request->getContext();
diff --git a/pages/catalog/CatalogBookHandler.php b/pages/catalog/CatalogBookHandler.php
index 19e83dc7380..6fb7fac0f29 100755
--- a/pages/catalog/CatalogBookHandler.php
+++ b/pages/catalog/CatalogBookHandler.php
@@ -19,7 +19,6 @@
 
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\handler\Handler;
 use APP\monograph\Chapter;
@@ -390,7 +389,7 @@ public function download($args, $request, $view = false)
         }
 
         $path = $submissionFile->getData('path');
-        $filename = Services::get('file')->formatFilename($path, $submissionFile->getLocalizedData('name'));
+        $filename = app()->get('file')->formatFilename($path, $submissionFile->getLocalizedData('name'));
         switch ($submissionFile->getData('assocType')) {
             case Application::ASSOC_TYPE_PUBLICATION_FORMAT: // Publication format file
                 if ($submissionFile->getData('assocId') != $publicationFormat->getId() || $submissionFile->getDirectSalesPrice() === null) {
@@ -403,7 +402,7 @@ public function download($args, $request, $view = false)
                 if (!$genre->getDependent()) {
                     $dispatcher->handle404();
                 }
-                return Services::get('file')->download($submissionFile->getData('fileId'), $filename);
+                return app()->get('file')->download($submissionFile->getData('fileId'), $filename);
             default: $dispatcher->handle404();
         }
 
@@ -464,7 +463,7 @@ public function download($args, $request, $view = false)
             }
             $returner = true;
             Hook::call('FileManager::downloadFileFinished', [&$returner]);
-            return Services::get('file')->download($submissionFile->getData('fileId'), $filename, $inline);
+            return app()->get('file')->download($submissionFile->getData('fileId'), $filename, $inline);
         }
 
         // Fall-through: user needs to pay for purchase.
diff --git a/pages/workflow/WorkflowHandler.php b/pages/workflow/WorkflowHandler.php
index 2f5400bc478..73dae3d1fc7 100644
--- a/pages/workflow/WorkflowHandler.php
+++ b/pages/workflow/WorkflowHandler.php
@@ -19,7 +19,6 @@
 use APP\components\listPanels\ContributorsListPanel;
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\decision\types\AcceptFromInternal;
 use APP\decision\types\CancelInternalReviewRound;
 use APP\decision\types\DeclineInternal;
@@ -112,7 +111,7 @@ public function setupIndex($request)
 
         $submissionContext = $request->getContext();
         if ($submission->getData('contextId') !== $submissionContext->getId()) {
-            $submissionContext = Services::get('context')->get($submission->getData('contextId'));
+            $submissionContext = app()->get('context')->get($submission->getData('contextId'));
         }
 
         $latestPublication = $submission->getLatestPublication();
diff --git a/plugins/generic/htmlMonographFile/HtmlMonographFilePlugin.php b/plugins/generic/htmlMonographFile/HtmlMonographFilePlugin.php
index 936e7ccf026..10c1a0bec4d 100644
--- a/plugins/generic/htmlMonographFile/HtmlMonographFilePlugin.php
+++ b/plugins/generic/htmlMonographFile/HtmlMonographFilePlugin.php
@@ -16,7 +16,6 @@
 
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\file\PublicFileManager;
 use APP\monograph\ChapterDAO;
@@ -163,7 +162,7 @@ public function downloadCallback($hookName, $params)
      */
     public function _getHTMLContents($request, $monograph, $publicationFormat, $submissionFile)
     {
-        $contents = Services::get('file')->fs->read($submissionFile->getData('path'));
+        $contents = app()->get('file')->fs->read($submissionFile->getData('path'));
 
         // Replace media file references
         $proofCollector = Repo::submissionFile()
diff --git a/plugins/importexport/csv/CSVImportExportPlugin.php b/plugins/importexport/csv/CSVImportExportPlugin.php
index 6a72792f729..bfded81317e 100644
--- a/plugins/importexport/csv/CSVImportExportPlugin.php
+++ b/plugins/importexport/csv/CSVImportExportPlugin.php
@@ -16,7 +16,6 @@
 
 use APP\core\Application;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\publicationFormat\PublicationDateDAO;
 use APP\publicationFormat\PublicationFormatDAO;
@@ -264,7 +263,7 @@ public function executeCLI($scriptName, &$args)
             $extension = $fileManager->parseFileExtension($filename);
             $submissionDir = Repo::submissionFile()->getSubmissionDir($press->getId(), $submissionId);
             /** @var \PKP\services\PKPFileService */
-            $fileService = Services::get('file');
+            $fileService = app()->get('file');
             $fileId = $fileService->add(
                 $filename,
                 $submissionDir . '/' . uniqid() . '.' . $extension
diff --git a/tests/classes/monograph/SubmissionFileDAOTest.php b/tests/classes/monograph/SubmissionFileDAOTest.php
index 3913bcda43c..4d5276566f2 100644
--- a/tests/classes/monograph/SubmissionFileDAOTest.php
+++ b/tests/classes/monograph/SubmissionFileDAOTest.php
@@ -21,7 +21,6 @@
 use APP\core\Application;
 use APP\core\PageRouter;
 use APP\core\Request;
-use APP\core\Services;
 use APP\facades\Repo;
 use APP\press\Press;
 use APP\submission\Submission;
@@ -77,7 +76,7 @@ protected function setUp(): void
 
         // Register a mock monograph DAO.
         $submissionDao = $this->getMockBuilder(\APP\submission\DAO::class)
-            ->setConstructorArgs([Services::get('schema')])
+            ->setConstructorArgs([app()->get('schema')])
             ->onlyMethods(['get'])
             ->getMock();
         $monograph = new Submission();
@@ -153,7 +152,7 @@ public function testSubmissionFileCrud()
         // Create test files
         $submissionDir = Repo::submissionFile()
             ->getSubmissionDir(static::SUBMISSION_FILE_DAO_TEST_PRESS_ID, $submissionId);
-        $fileId1 = Services::get('file')->add(
+        $fileId1 = app()->get('file')->add(
             $this->testFile1,
             $submissionDir . '/' . uniqid() . '.txt'
         );
@@ -167,7 +166,7 @@ public function testSubmissionFileCrud()
             'createdAt' => '2011-12-05 00:00:00',
             'updatedAt' => '2011-12-05 00:00:00',
         ]);
-        $fileId2 = Services::get('file')->add(
+        $fileId2 = app()->get('file')->add(
             $this->testFile2,
             $submissionDir . '/' . uniqid() . '.txt'
         );
@@ -207,7 +206,7 @@ public function testSubmissionFileCrud()
         static::assertEquals($submissionFile2->getData('genreId'), static::SUBMISSION_FILE_DAO_TEST_ART_GENRE_ID);
 
         // Save a new revision of a submission file
-        $fileId3 = Services::get('file')->add(
+        $fileId3 = app()->get('file')->add(
             $this->testFile3,
             $submissionDir . '/' . uniqid() . '.txt'
         );
diff --git a/tools/buildpkg.sh b/tools/buildpkg.sh
index 8f3752ee27b..447d4654907 100755
--- a/tools/buildpkg.sh
+++ b/tools/buildpkg.sh
@@ -87,7 +87,6 @@ lib/pkp/lib/vendor/leafo/lessphp/docs							\
 lib/pkp/lib/vendor/moxiecode/plupload/examples						\
 lib/pkp/lib/vendor/robloach								\
 lib/pkp/lib/vendor/smarty/smarty/demo							\
-lib/pkp/lib/vendor/pimple/pimple/ext/pimple/tests					\
 lib/pkp/lib/vendor/phpunit								\
 lib/pkp/lib/vendor/phpdocumentor/reflection-docblock					\
 lib/pkp/lib/vendor/doctrine/instantiator/tests						\