diff --git a/lib/Data.php b/lib/Data.php
index 1fb908990..0dc82e3eb 100644
--- a/lib/Data.php
+++ b/lib/Data.php
@@ -9,7 +9,6 @@
 
 namespace OCA\Activity;
 
-use Doctrine\DBAL\Platforms\MySQLPlatform;
 use OCA\Activity\Filter\AllFilter;
 use OCP\Activity\Exceptions\FilterNotFoundException;
 use OCP\Activity\IEvent;
@@ -526,8 +525,7 @@ public function expire($expireDays = 365) {
 	 * @psalm-param list<array{0: string, 1: mixed, 2?: string}> $conditions
 	 */
 	public function deleteActivities(array $conditions): void {
-		$platform = $this->connection->getDatabasePlatform();
-		if ($platform instanceof MySQLPlatform) {
+		if ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_MYSQL) {
 			$this->logger->debug('Choosing chunked activity delete for MySQL/MariaDB', ['app' => 'activity']);
 			$this->deleteActivitiesForMySQL($conditions);
 			return;
diff --git a/lib/Migration/Version2006Date20170808154933.php b/lib/Migration/Version2006Date20170808154933.php
index ed98e142a..565663220 100644
--- a/lib/Migration/Version2006Date20170808154933.php
+++ b/lib/Migration/Version2006Date20170808154933.php
@@ -7,8 +7,8 @@
 
 namespace OCA\Activity\Migration;
 
-use Doctrine\DBAL\Types\Types;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
@@ -32,55 +32,55 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 				'notnull' => true,
 				'length' => 20,
 			]);
-			$table->addColumn('timestamp', 'integer', [
+			$table->addColumn('timestamp', Types::INTEGER, [
 				'notnull' => true,
 				'length' => 4,
 				'default' => 0,
 			]);
-			$table->addColumn('priority', 'integer', [
+			$table->addColumn('priority', Types::INTEGER, [
 				'notnull' => true,
 				'length' => 4,
 				'default' => 0,
 			]);
-			$table->addColumn('type', 'string', [
+			$table->addColumn('type', Types::STRING, [
 				'notnull' => false,
 				'length' => 255,
 			]);
-			$table->addColumn('user', 'string', [
+			$table->addColumn('user', Types::STRING, [
 				'notnull' => false,
 				'length' => 64,
 			]);
-			$table->addColumn('affecteduser', 'string', [
+			$table->addColumn('affecteduser', Types::STRING, [
 				'notnull' => true,
 				'length' => 64,
 			]);
-			$table->addColumn('app', 'string', [
+			$table->addColumn('app', Types::STRING, [
 				'notnull' => true,
 				'length' => 32,
 			]);
-			$table->addColumn('subject', 'string', [
+			$table->addColumn('subject', Types::STRING, [
 				'notnull' => true,
 				'length' => 255,
 			]);
-			$table->addColumn('subjectparams', 'text', [
+			$table->addColumn('subjectparams', Types::TEXT, [
 				'notnull' => true,
 			]);
-			$table->addColumn('message', 'string', [
+			$table->addColumn('message', Types::STRING, [
 				'notnull' => false,
 				'length' => 255,
 			]);
-			$table->addColumn('messageparams', 'text', [
+			$table->addColumn('messageparams', Types::TEXT, [
 				'notnull' => false,
 			]);
-			$table->addColumn('file', 'string', [
+			$table->addColumn('file', Types::STRING, [
 				'notnull' => false,
 				'length' => 4000,
 			]);
-			$table->addColumn('link', 'string', [
+			$table->addColumn('link', Types::STRING, [
 				'notnull' => false,
 				'length' => 4000,
 			]);
-			$table->addColumn('object_type', 'string', [
+			$table->addColumn('object_type', Types::STRING, [
 				'notnull' => false,
 				'length' => 255,
 			]);
@@ -105,33 +105,33 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 				'notnull' => true,
 				'length' => 20,
 			]);
-			$table->addColumn('amq_timestamp', 'integer', [
+			$table->addColumn('amq_timestamp', Types::INTEGER, [
 				'notnull' => true,
 				'length' => 4,
 				'default' => 0,
 			]);
-			$table->addColumn('amq_latest_send', 'integer', [
+			$table->addColumn('amq_latest_send', Types::INTEGER, [
 				'notnull' => true,
 				'length' => 4,
 				'default' => 0,
 			]);
-			$table->addColumn('amq_type', 'string', [
+			$table->addColumn('amq_type', Types::STRING, [
 				'notnull' => true,
 				'length' => 255,
 			]);
-			$table->addColumn('amq_affecteduser', 'string', [
+			$table->addColumn('amq_affecteduser', Types::STRING, [
 				'notnull' => true,
 				'length' => 64,
 			]);
-			$table->addColumn('amq_appid', 'string', [
+			$table->addColumn('amq_appid', Types::STRING, [
 				'notnull' => true,
 				'length' => 255,
 			]);
-			$table->addColumn('amq_subject', 'string', [
+			$table->addColumn('amq_subject', Types::STRING, [
 				'notnull' => true,
 				'length' => 255,
 			]);
-			$table->addColumn('amq_subjectparams', 'text', [
+			$table->addColumn('amq_subjectparams', Types::TEXT, [
 				'notnull' => true,
 			]);
 			$table->setPrimaryKey(['mail_id']);
diff --git a/lib/Migration/Version2006Date20170808155040.php b/lib/Migration/Version2006Date20170808155040.php
index 50e573ffe..92aedd8b8 100644
--- a/lib/Migration/Version2006Date20170808155040.php
+++ b/lib/Migration/Version2006Date20170808155040.php
@@ -17,7 +17,7 @@ class Version2006Date20170808155040 extends SimpleMigrationStep {
 	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @return null|ISchemaWrapper
-	 * @throws \Doctrine\DBAL\Schema\SchemaException
+	 * @throws \OCP\DB\Schema\SchemaException
 	 * @since 13.0.0
 	 */
 	#[\Override]
diff --git a/lib/Migration/Version2007Date20181107114613.php b/lib/Migration/Version2007Date20181107114613.php
index ccdca55cf..2b8f6db49 100644
--- a/lib/Migration/Version2007Date20181107114613.php
+++ b/lib/Migration/Version2007Date20181107114613.php
@@ -9,8 +9,8 @@
 namespace OCA\Activity\Migration;
 
 use Closure;
-use Doctrine\DBAL\Types\Types;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
diff --git a/lib/Migration/Version2008Date20181011095117.php b/lib/Migration/Version2008Date20181011095117.php
index a89939970..ca9bcb77d 100644
--- a/lib/Migration/Version2008Date20181011095117.php
+++ b/lib/Migration/Version2008Date20181011095117.php
@@ -9,9 +9,9 @@
 namespace OCA\Activity\Migration;
 
 use Closure;
-use Doctrine\DBAL\Schema\SchemaException;
-use Doctrine\DBAL\Types\Types;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Schema\SchemaException;
+use OCP\DB\Types;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
diff --git a/lib/Migration/Version2011Date20201006132544.php b/lib/Migration/Version2011Date20201006132544.php
index fed6b1368..1bdbcf823 100644
--- a/lib/Migration/Version2011Date20201006132544.php
+++ b/lib/Migration/Version2011Date20201006132544.php
@@ -9,8 +9,8 @@
 namespace OCA\Activity\Migration;
 
 use Closure;
-use Doctrine\DBAL\Types\Type;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
@@ -37,14 +37,14 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 		$table = $schema->getTable('activity_mq');
 
 		$column = $table->getColumn('amq_appid');
-		$column->setType(Type::getType('string'));
+		$column->setType(Types::STRING);
 		$column->setNotnull(true);
 		$column->setLength(32);
 
 		$column = $table->getColumn('amq_subjectparams');
 		// Can't switch from Long to clob on Oracle, so we need an intermediate column
-		if ($column->getType() !== Type::getType('text')) {
-			$table->addColumn('amq_subjectparams2', 'text', [
+		if ($column->getType()->getName() !== Types::TEXT) {
+			$table->addColumn('amq_subjectparams2', Types::TEXT, [
 				'notnull' => false,
 			]);
 		}
diff --git a/lib/Migration/Version2011Date20201006132545.php b/lib/Migration/Version2011Date20201006132545.php
index 13ce41688..9fbcb53b5 100644
--- a/lib/Migration/Version2011Date20201006132545.php
+++ b/lib/Migration/Version2011Date20201006132545.php
@@ -9,8 +9,8 @@
 namespace OCA\Activity\Migration;
 
 use Closure;
-use Doctrine\DBAL\Types\Type;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
@@ -28,7 +28,7 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 
 		$table = $schema->getTable('activity_mq');
 		$column = $table->getColumn('amq_subjectparams');
-		if ($column->getType() !== Type::getType('text')) {
+		if ($column->getType()->getName() !== Types::TEXT) {
 			$table->dropColumn('amq_subjectparams');
 			return $schema;
 		}
diff --git a/lib/Migration/Version2011Date20201006132546.php b/lib/Migration/Version2011Date20201006132546.php
index 68940e7fb..30fc009c4 100644
--- a/lib/Migration/Version2011Date20201006132546.php
+++ b/lib/Migration/Version2011Date20201006132546.php
@@ -10,6 +10,7 @@
 
 use Closure;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
@@ -35,7 +36,7 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 
 		$table = $schema->getTable('activity_mq');
 		if (!$table->hasColumn('amq_subjectparams')) {
-			$table->addColumn('amq_subjectparams', 'text', [
+			$table->addColumn('amq_subjectparams', Types::TEXT, [
 				'notnull' => false,
 			]);
 			return $schema;
diff --git a/psalm.xml b/psalm.xml
index 87f648069..0dfcf7ff1 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -42,11 +42,6 @@
 		</UndefinedClass>
 		<UndefinedDocblockClass>
 			<errorLevel type="suppress">
-				<referencedClass name="Doctrine\DBAL\Driver\Statement" />
-				<referencedClass name="Doctrine\DBAL\Platforms\AbstractPlatform" />
-				<referencedClass name="Doctrine\DBAL\Schema\Schema" />
-				<referencedClass name="Doctrine\DBAL\Schema\SchemaException" />
-				<referencedClass name="Doctrine\DBAL\Schema\Table" />
 				<referencedClass name="OC\Files\View" />
 				<referencedClass name="OC\TagManager" />
 				<referencedClass name="OC\Hooks\Emitter" />
diff --git a/tests/Migration/Version8000Date20260603120000Test.php b/tests/Migration/Version8000Date20260603120000Test.php
index 969d3449c..2704accd7 100644
--- a/tests/Migration/Version8000Date20260603120000Test.php
+++ b/tests/Migration/Version8000Date20260603120000Test.php
@@ -8,10 +8,10 @@
 
 namespace OCA\Activity\Tests\Migration;
 
-use Doctrine\DBAL\Schema\Table;
 use OCA\Activity\Migration\Version8000Date20260603120000;
 use OCA\Activity\Tests\TestCase;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Schema\ITable;
 use OCP\Migration\IOutput;
 use PHPUnit\Framework\MockObject\MockObject;
 
@@ -34,7 +34,7 @@ protected function setUp(): void {
 	 * migration adds the covering composite index and drops the now-redundant one.
 	 */
 	public function testAddsCompositeIndexAndDropsRedundantOne(): void {
-		$table = $this->createMock(Table::class);
+		$table = $this->createMock(ITable::class);
 		$table->method('hasIndex')
 			->willReturnMap([
 				['amp_user_send', false],
@@ -58,7 +58,7 @@ public function testAddsCompositeIndexAndDropsRedundantOne(): void {
 	 * must be a no-op so re-runs / fresh installs are not touched.
 	 */
 	public function testIsIdempotentWhenAlreadyMigrated(): void {
-		$table = $this->createMock(Table::class);
+		$table = $this->createMock(ITable::class);
 		$table->method('hasIndex')
 			->willReturnMap([
 				['amp_user_send', true],
@@ -91,7 +91,7 @@ public function testSkipsWhenTableIsMissing(): void {
 		$this->assertNull($result);
 	}
 
-	protected function getSchemaMock(Table&MockObject $table): ISchemaWrapper&MockObject {
+	protected function getSchemaMock(ITable&MockObject $table): ISchemaWrapper&MockObject {
 		$schema = $this->createMock(ISchemaWrapper::class);
 		$schema->method('hasTable')
 			->with('activity_mq')
diff --git a/vendor-bin/psalm/composer.lock b/vendor-bin/psalm/composer.lock
index d2cdc8aa3..bad0e721d 100644
--- a/vendor-bin/psalm/composer.lock
+++ b/vendor-bin/psalm/composer.lock
@@ -1638,12 +1638,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/nextcloud-deps/ocp.git",
-                "reference": "cba9ce148ee675a84f659024d0362f47193e5230"
+                "reference": "db762274e838d1cc0149a3e4718f27823f306646"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nextcloud-deps/ocp/zipball/cba9ce148ee675a84f659024d0362f47193e5230",
-                "reference": "cba9ce148ee675a84f659024d0362f47193e5230",
+                "url": "https://api.github.com/repos/nextcloud-deps/ocp/zipball/db762274e838d1cc0149a3e4718f27823f306646",
+                "reference": "db762274e838d1cc0149a3e4718f27823f306646",
                 "shasum": ""
             },
             "require": {
@@ -1652,7 +1652,10 @@
                 "psr/container": "^2.0.2",
                 "psr/event-dispatcher": "^1.0",
                 "psr/http-client": "^1.0.3",
-                "psr/log": "^3.0.2"
+                "psr/log": "^3.0.2",
+                "symfony/polyfill-intl-normalizer": "^1.38",
+                "symfony/polyfill-php84": "^1.38",
+                "symfony/polyfill-php85": "^1.41"
             },
             "default-branch": true,
             "type": "library",
@@ -1680,7 +1683,7 @@
                 "issues": "https://github.com/nextcloud-deps/ocp/issues",
                 "source": "https://github.com/nextcloud-deps/ocp/tree/master"
             },
-            "time": "2026-08-09T00:51:34+00:00"
+            "time": "2026-08-11T07:17:04+00:00"
         },
         {
             "name": "nikic/php-parser",
@@ -3219,6 +3222,86 @@
             ],
             "time": "2026-05-26T12:51:13+00:00"
         },
+        {
+            "name": "symfony/polyfill-php85",
+            "version": "v1.41.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php85.git",
+                "reference": "255fab485aaa1006ed411040c42aecd7b5302d7a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php85/zipball/255fab485aaa1006ed411040c42aecd7b5302d7a",
+                "reference": "255fab485aaa1006ed411040c42aecd7b5302d7a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/polyfill",
+                    "name": "symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php85\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.5+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php85/tree/v1.41.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-07-01T12:47:55+00:00"
+        },
         {
             "name": "symfony/service-contracts",
             "version": "v3.7.1",