--- a/src/luan/modules/Time.luan	Tue Feb 06 22:04:47 2018 -0700
+++ b/src/luan/modules/Time.luan	Wed Feb 07 17:36:38 2018 -0700
@@ -3,10 +3,11 @@
 java()
 local Luan = require "luan:Luan.luan"
 local error = Luan.error
-local assert_long = Luan.assert_long or error()
 local ipairs = Luan.ipairs or error()
 local Math = require "luan:Math.luan"
 local floor = Math.floor or error()
+local Number = require "luan:Number.luan"
+local long = Number.long or error()
 local Table = require "luan:Table.luan"
 local System = require "java:java.lang.System"
 local Calendar = require "java:java.util.Calendar"
@@ -55,7 +56,7 @@
 end
 
 function Time.format(time,pattern)
-	time = assert_long(time)
+	time = long(time)
 	pattern = pattern or "yyyy-MM-dd HH:mm:ss"
 	local fmt = SimpleDateFormat.new(pattern)
 	set_time_zone(fmt)