diff --git a/build-constraints.yaml b/build-constraints.yaml
index a50a093a..75ee4ae8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2407,7 +2407,7 @@ packages:
 
     "Michael Xavier <michael@michaelxavier.net> @MichaelXavier":
         - uri-bytestring
-        - cron
+        - cron < 0 # ghc-9.6 https://github.com/MichaelXavier/cron/issues/50
         - tasty-tap
         - tasty-fail-fast
         - drifter