add linebreak
diff --git a/R/zzz.R b/R/zzz.R
index a444d34..02f4487 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -14,5 +14,6 @@
     usepackage_latex("threeparttable")
     usepackage_latex("threeparttablex")
     usepackage_latex("ulem", "normalem")
+    usepackage_latex("makecell")
   }
 }