diff --git a/server/api/index.js b/server/api/index.js
index 89eab7f..8276aaf 100644
--- a/server/api/index.js
+++ b/server/api/index.js
@@ -231,6 +231,7 @@ export async function getHistory(req, res) {
     return {
       id: element.id,
       type: element.type,
+      class: element.substitution.class,
       substitutionId: element.substitutionId,
       lesson: element.substitution.lesson,
       updatedAt: new Date(element.createdAt).getTime(),