diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9b6efa60..9a75a8bc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4301,6 +4301,7 @@ packages:
 
     "Michael B. Gale <m.gale@warwick.ac.uk> @mbg":
         - c14n
+        - wai-saml2
 
     "Grandfathered dependencies":
         - network