diff --git a/modules/os2forms_digital_post/src/Drush/Commands/DigitalPostTestCommands.php b/modules/os2forms_digital_post/src/Drush/Commands/DigitalPostTestCommands.php
index 8db7f4f1..248452a3 100644
--- a/modules/os2forms_digital_post/src/Drush/Commands/DigitalPostTestCommands.php
+++ b/modules/os2forms_digital_post/src/Drush/Commands/DigitalPostTestCommands.php
@@ -2,7 +2,7 @@
 
 namespace Drupal\os2forms_digital_post\Drush\Commands;
 
-use Drupal\Core\Serialization\Yaml;
+use Drupal\Component\Serialization\Yaml;
 use Drupal\Core\Utility\Token;
 use Drupal\entity_print\Plugin\EntityPrintPluginManagerInterface;
 use Drupal\os2forms_digital_post\Helper\DigitalPostHelper;
diff --git a/modules/os2forms_digital_post/src/Helper/CertificateLocatorHelper.php b/modules/os2forms_digital_post/src/Helper/CertificateLocatorHelper.php
index 7c4d4117..10e6ac57 100644
--- a/modules/os2forms_digital_post/src/Helper/CertificateLocatorHelper.php
+++ b/modules/os2forms_digital_post/src/Helper/CertificateLocatorHelper.php
@@ -4,7 +4,7 @@
 
 use Drupal\os2forms_digital_post\Exception\CertificateLocatorException;
 use GuzzleHttp\Client;
-use Http\Adapter\Guzzle6\Client as GuzzleAdapter;
+use Http\Adapter\Guzzle7\Client as GuzzleAdapter;
 use Http\Factory\Guzzle\RequestFactory;
 use ItkDev\AzureKeyVault\Authorisation\VaultToken;
 use ItkDev\AzureKeyVault\KeyVault\VaultSecret;