diff --git a/src/Provider/Doctrine/Auditing/Transaction/TransactionProcessor.php b/src/Provider/Doctrine/Auditing/Transaction/TransactionProcessor.php
index 219aa61e..515c1f5a 100644
--- a/src/Provider/Doctrine/Auditing/Transaction/TransactionProcessor.php
+++ b/src/Provider/Doctrine/Auditing/Transaction/TransactionProcessor.php
@@ -219,7 +219,7 @@ private function audit(array $data): void
             'object_id' => (string) $data['id'],
             'discriminator' => $data['discriminator'],
             'transaction_hash' => (string) $data['transaction_hash'],
-            'diffs' => json_encode($data['diff'], JSON_THROW_ON_ERROR),
+            'diffs' => json_encode(mb_convert_encoding($data['diff'], 'UTF-8', 'UTF-8'), JSON_THROW_ON_ERROR),
             'blame_id' => $data['blame']['user_id'],
             'blame_user' => $data['blame']['username'],
             'blame_user_fqdn' => $data['blame']['user_fqdn'],