diff --git a/gitlab/v4/objects/branches.py b/gitlab/v4/objects/branches.py
index 11e53a0e1..6b1b27f3e 100644
--- a/gitlab/v4/objects/branches.py
+++ b/gitlab/v4/objects/branches.py
@@ -84,5 +84,6 @@ class ProjectProtectedBranchManager(NoUpdateMixin, RESTManager):
             "allowed_to_push",
             "allowed_to_merge",
             "allowed_to_unprotect",
+            "code_owner_approval_required",
         ),
     )