diff --git a/build-constraints.yaml b/build-constraints.yaml
index b068e0a3..c86b8997 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -613,6 +613,7 @@ packages:
 
     "Colin Woodbury <colingw@gmail.com> @fosskers":
         - microlens-aeson
+        - kanji
 
     "Ketil Malde":
         - biocore