diff --git a/decile.R b/decile.R
index 41daf5d..d875b04 100644
--- a/decile.R
+++ b/decile.R
@@ -1,3 +1,5 @@
+require(data.table)
+
 decile_dt <-  function(x, ile = 10, decreasing = TRUE) {
   
   # x should be a numeric vector