diff --git a/R/util.R b/R/util.R
index 23a4802..2d91900 100644
--- a/R/util.R
+++ b/R/util.R
@@ -114,7 +114,8 @@
     "\\usepackage[normalem]{ulem}",
     "\\usepackage[normalem]{ulem}",
     "\\usepackage[utf8]{inputenc}",
-    "\\usepackage{makecell}"
+    "\\usepackage{makecell}",
+    "\\usepackage{xcolor}"
   ))
 }