replace threeparttable with threeparttablex;
Fixed #119
diff --git a/R/zzz.R b/R/zzz.R
index 74e9464..38c06b0 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -11,7 +11,7 @@
     usepackage_latex("colortbl")
     usepackage_latex("pdflscape")
     usepackage_latex("tabu")
-    usepackage_latex("threeparttable")
+    usepackage_latex("threeparttablex")
     usepackage_latex("ulem", "normalem")
   }
 }