diff --git a/R/util.R b/R/util.R
index e0db2e8..5d53369 100644
--- a/R/util.R
+++ b/R/util.R
@@ -111,7 +111,9 @@
     "\\usepackage{pdflscape}",
     "\\usepackage{tabu}",
     "\\usepackage{threeparttable}",
-    "\\usepackage[normalem]{ulem}"
+    "\\usepackage{threeparttablex}",
+    "\\usepackage[normalem]{ulem}",
+    "\\usepackage{makecell}"
   ))
 }