diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 96be311..aaf0efd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -58,6 +58,7 @@ env:
     cm-unicode
     csquotes
     cyrillic
+    lh
     dvips
     enumitem
     environ