diff --git a/lib/gitlab.atd b/lib/gitlab.atd
index 0607a6c..5eb9637 100644
--- a/lib/gitlab.atd
+++ b/lib/gitlab.atd
@@ -369,7 +369,7 @@ type merge_request = {
   downvotes: int;
   author: user_short;
   assignee: user_short nullable;
-  approvals_before_merge: int nullable;
+  ?approvals_before_merge: int nullable;
   ?allow_collaboration: bool nullable;
   ?allow_maintainer_to_push: bool nullable;
   blocking_discussions_resolved: bool;