diff --git a/build-constraints.yaml b/build-constraints.yaml
index 379d3c70..eb9ea037 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2375,6 +2375,10 @@ packages:
         - dimensional
         - exact-pi
         - numtype-dk
+
+    "Bjorn Buckwalter <bjorn@buckwalter.se> @bjornbm":
+        - leapseconds-announced
+
     "Pavel Ryzhov <paul@paulrz.cz> @paulrzcz":
         - hquantlib
         - persistent-redis