diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 940dbf5e..b1887848 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -36,7 +36,20 @@ public function getConfigTreeBuilder()
                 ->scalarNode('revision_field_name')->defaultValue('rev')->end()
                 ->scalarNode('revision_type_field_name')->defaultValue('revtype')->end()
                 ->scalarNode('revision_table_name')->defaultValue('revisions')->end()
-                ->scalarNode('revision_id_field_type')->defaultValue('integer')->end()
+                ->scalarNode('revision_id_field_type')
+                    ->defaultValue('integer')
+                    // NEXT_MAJOR: Use validate() instead.
+                    ->beforeNormalization()
+                        ->always(static function ($value) {
+                            if (null !== $value && !\in_array($value, ['integer', 'string'], true)) {
+                                @trigger_error(sprintf(
+                                    'Passing another value than "integer" and "string" as "revision_id_field_type" is deprecated'
+                                    .' since sonata-project/entity-audit-bundle 1.3 and will throw an error in version 2.0.',
+                                ), \E_USER_DEPRECATED);
+                            }
+                        })
+                    ->end()
+                ->end()
                 ->arrayNode('service')
                     ->addDefaultsIfNotSet()
                     ->children()