diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4ccffadd..0d8ee2de 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8063,6 +8063,9 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/7857
         - QuickCheck < 2.17.0.0
+
+        # https://github.com/commercialhaskell/stackage/issues/7859
+        - pqueue < 1.6.0.0
     # end of Stackage upper bounds
 # end of packages