diff --git a/build-constraints.yaml b/build-constraints.yaml
index 738e56d1..52d33575 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6676,6 +6676,7 @@ packages:
       - stache < 2.3.1
       - stripe-scotty < 1.1.0.1
       - stripe-wreq < 1.0.1.12
+      - kanji < 3.5
 
       # https://github.com/commercialhaskell/stackage/issues/6237
       - lucid < 2.9.13