diff --git a/lib/coinmarketcap.rb b/lib/coinmarketcap.rb
index 1da7f05..8e0acd1 100644
--- a/lib/coinmarketcap.rb
+++ b/lib/coinmarketcap.rb
@@ -35,10 +35,11 @@ def self.get_historical_price(id, start_date, end_date) #20170908
         price_bundle = {}
         each_row = Nokogiri::HTML(row.to_s).css('td')
         price_bundle[:date] = Date.parse(each_row[0].text)
-        price_bundle[:open] = each_row[1].text
-        price_bundle[:high] = each_row[2].text
-        price_bundle[:low] = each_row[3].text
-        price_bundle[:close] = each_row[4].text
+        price_bundle[:open] = each_row[1].text.to_f
+        price_bundle[:high] = each_row[2].text.to_f
+        price_bundle[:low] = each_row[3].text.to_f
+        price_bundle[:close] = each_row[4].text.to_f
+        price_bundle[:avg] = ( price_bundle[:high] + price_bundle[:low] ) / 2.0
         prices << price_bundle
       rescue => error
         next
diff --git a/lib/coinmarketcap/version.rb b/lib/coinmarketcap/version.rb
index e0b6d7b..f985c09 100644
--- a/lib/coinmarketcap/version.rb
+++ b/lib/coinmarketcap/version.rb
@@ -1,3 +1,3 @@
 module Coinmarketcap
-  VERSION = "0.2.1"
+  VERSION = "0.2.2"
 end