diff --git a/lib/granblue/importers/weapon_importer.rb b/lib/granblue/importers/weapon_importer.rb
index f16b5fe..bdc6c91 100644
--- a/lib/granblue/importers/weapon_importer.rb
+++ b/lib/granblue/importers/weapon_importer.rb
@@ -71,7 +71,7 @@ module Granblue
           rarity: parse_integer(row['rarity']),
           element: parse_integer(row['element']),
           proficiency: parse_integer(row['proficiency']),
-          series: parse_integer(row['series']),
+          series: parse_value(row['series']),
           flb: parse_boolean(row['flb']),
           ulb: parse_boolean(row['ulb']),
           max_level: parse_integer(row['max_level']),