diff --git a/src/Plugin/migrate/source/HttpSourcePluginBase.php b/src/Plugin/migrate/source/HttpSourcePluginBase.php
index 4ebe0941..9790043f 100644
--- a/src/Plugin/migrate/source/HttpSourcePluginBase.php
+++ b/src/Plugin/migrate/source/HttpSourcePluginBase.php
@@ -7,6 +7,7 @@
 use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\Cache\CacheableDependencyInterface;
 use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\helfi_api_base\Event\MigrationConfigurationEvent;
 use Drupal\helfi_api_base\MigrateTrait;
 use Drupal\migrate\Plugin\migrate\source\SourcePluginBase;
@@ -19,7 +20,7 @@
 /**
  * Provides a HTTP source plugin.
  */
-abstract class HttpSourcePluginBase extends SourcePluginBase implements CacheableDependencyInterface {
+abstract class HttpSourcePluginBase extends SourcePluginBase implements CacheableDependencyInterface, ContainerFactoryPluginInterface {
 
   use MigrateTrait;