diff --git a/build-constraints.yaml b/build-constraints.yaml
index cc1b209b..9a1d0401 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3301,6 +3301,7 @@ packages:
         - hOpenPGP < 2.6
         - cereal-conduit < 0.8
         - zip < 1
+        - stm-conduit < 4.0.0
 
         # https://github.com/fpco/stackage/issues/3252
         - conduit-combinators < 1.3.0