diff --git a/src/crystal-scatter/ring.cr b/src/crystal-scatter/ring.cr
index b24b4c5..5308719 100644
--- a/src/crystal-scatter/ring.cr
+++ b/src/crystal-scatter/ring.cr
@@ -1,9 +1,13 @@
+require "json"
+
 module Crystal::Scatter 
 
     class Slice
-        property s_begin : UInt64
-        property s_end : UInt64
-        property url : String
+        JSON.mapping(
+            s_begin: UInt64,
+            s_end: UInt64,
+            url: String
+        )
 
         def initialize(@s_begin,@s_end,@url)
         end