diff --git a/build-constraints.yaml b/build-constraints.yaml
index 896b8860..36729f67 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4303,6 +4303,7 @@ packages:
 
     "Michael B. Gale <m.gale@warwick.ac.uk> @mbg":
         - c14n
+        - wai-saml2
 
     "Grandfathered dependencies":
         - network