diff --git a/backend/examples/serializers.py b/backend/examples/serializers.py
index 3a50c08b..22c51bf6 100644
--- a/backend/examples/serializers.py
+++ b/backend/examples/serializers.py
@@ -43,5 +43,5 @@ class ExampleSerializer(serializers.ModelSerializer):
 class ExampleStateSerializer(serializers.ModelSerializer):
     class Meta:
         model = ExampleState
-        fields = ("id", "example", "confirmed_by")
-        read_only_fields = ("id", "example", "confirmed_by")
+        fields = ("id", "example", "confirmed_by", "confirmed_at")
+        read_only_fields = ("id", "example", "confirmed_by", "confirmed_at")