diff --git a/stack.pkg.yaml b/stack.pkg.yaml
index fe5103ecf..7a0275e91 100644
--- a/stack.pkg.yaml
+++ b/stack.pkg.yaml
@@ -19,4 +19,5 @@ packages:
 extra-deps:
 - hslua-0.5.0
 - skylighting-0.3.3
+- texmath-0.9.4.1
 resolver: lts-8.16