diff --git a/phpBB/phpbb/composer/installer.php b/phpBB/phpbb/composer/installer.php
index 3e6d87d46f..313c538bdb 100644
--- a/phpBB/phpbb/composer/installer.php
+++ b/phpBB/phpbb/composer/installer.php
@@ -16,6 +16,7 @@ namespace phpbb\composer;
 use Composer\Composer;
 use Composer\DependencyResolver\Request as composer_request;
 use Composer\Factory;
+use Composer\Filter\PlatformRequirementFilter\PlatformRequirementFilterFactory;
 use Composer\IO\IOInterface;
 use Composer\IO\NullIO;
 use Composer\Json\JsonFile;
@@ -172,7 +173,7 @@ class installer
 			->setUpdate(true)
 			->setUpdateAllowList($whitelist)
 			->setUpdateAllowTransitiveDependencies(composer_request::UPDATE_ONLY_LISTED)
-			->setIgnorePlatformRequirements(false)
+			->setPlatformRequirementFilter(PlatformRequirementFilterFactory::fromBoolOrList(false))
 			->setOptimizeAutoloader(true)
 			->setDumpAutoloader(true)
 			->setPreferStable(true)
diff --git a/phpBB/phpbb/db/doctrine/postgresql_platform.php b/phpBB/phpbb/db/doctrine/postgresql_platform.php
index 1e81e59b19..ea637b4203 100644
--- a/phpBB/phpbb/db/doctrine/postgresql_platform.php
+++ b/phpBB/phpbb/db/doctrine/postgresql_platform.php
@@ -14,7 +14,7 @@
 namespace phpbb\db\doctrine;
 
 use Doctrine\DBAL\Platforms\AbstractPlatform;
-use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
+use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
 use Doctrine\DBAL\Schema\Index;
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\Table;
@@ -31,7 +31,7 @@ use Doctrine\DBAL\Types\Type;
  * to stay compatible with the existing DB we have to change its
  * naming and not ours.
  */
-class postgresql_platform extends PostgreSQLPlatform
+class postgresql_platform extends PostgreSQL94Platform
 {
 	/**
 	 * {@inheritdoc}