diff --git a/build-constraints.yaml b/build-constraints.yaml
index d129f3e5..754dadb6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4431,6 +4431,9 @@ packages:
 
     "Michael B. Gale <m.gale@warwick.ac.uk> @mbg":
         - c14n
+        - katip-logstash
+        - logstash
+        - monad-logger-logstash
         - moss
         - wai-rate-limit
         - wai-rate-limit-redis