diff --git a/build-constraints.yaml b/build-constraints.yaml
index 65fc9f87..673ea0ad 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3956,6 +3956,7 @@ packages:
     "Type Classes <hello@typeclasses.com> @argumatronic @chris-martin":
         - ascii
         - ascii-case
+        - ascii-caseless
         - ascii-char
         - ascii-group
         - ascii-numbers