diff --git a/lib/mtg_sdk/representers/card_representer.rb b/lib/mtg_sdk/representers/card_representer.rb
index a1640e3..eb250f6 100644
--- a/lib/mtg_sdk/representers/card_representer.rb
+++ b/lib/mtg_sdk/representers/card_representer.rb
@@ -32,7 +32,7 @@ module CardRepresenter
     property :hand
     property :life
     property :reserved
-    property :release_date, as: :releaseDate, type: Date
+    property :release_date, as: :releaseDate, type: Types::Params::Date
     property :starter
     property :original_text, as: :originalText
     property :original_type, as: :originalType
diff --git a/lib/mtg_sdk/representers/changelog_representer.rb b/lib/mtg_sdk/representers/changelog_representer.rb
index 913114b..db473dc 100644
--- a/lib/mtg_sdk/representers/changelog_representer.rb
+++ b/lib/mtg_sdk/representers/changelog_representer.rb
@@ -6,8 +6,8 @@ module ChangelogRepresenter
     include Roar::JSON
     include Roar::Coercion
   
-    property :release_date, as: :releaseDate, type: Date
+    property :release_date, as: :releaseDate, type: Types::Params::Date
     property :version
     property :details
   end
-end
\ No newline at end of file
+end
diff --git a/lib/mtg_sdk/representers/ruling_representer.rb b/lib/mtg_sdk/representers/ruling_representer.rb
index 5ad10c8..98763ec 100644
--- a/lib/mtg_sdk/representers/ruling_representer.rb
+++ b/lib/mtg_sdk/representers/ruling_representer.rb
@@ -6,7 +6,7 @@ module RulingRepresenter
     include Roar::JSON
     include Roar::Coercion
   
-    property :date, type: Date
+    property :date, type: Types::Params::Date
     property :text
   end
-end
\ No newline at end of file
+end
diff --git a/lib/mtg_sdk/representers/set_representer.rb b/lib/mtg_sdk/representers/set_representer.rb
index 7dd0eda..476e8d3 100644
--- a/lib/mtg_sdk/representers/set_representer.rb
+++ b/lib/mtg_sdk/representers/set_representer.rb
@@ -1,8 +1,10 @@
 require 'roar/json'
+require 'roar/coercion'
 
 module MTG
   module SetRepresenter
     include Roar::JSON
+    include Roar::Coercion
   
     property :code
     property :name
@@ -13,10 +15,10 @@ module SetRepresenter
     property :block
     property :old_code, as: :oldCode
     property :online_only, as: :onlineOnly
-    property :release_date, as: :releaseDate
+    property :release_date, as: :releaseDate, type: Types::Params::Date
     property :gatherer_code, as: :gatherCode
     property :magic_cards_info_code, as: :magicCardsInfoCode
     
     collection :booster
   end
-end
\ No newline at end of file
+end
diff --git a/mtg_sdk.gemspec b/mtg_sdk.gemspec
index 33c4cf6..8c5f18d 100644
--- a/mtg_sdk.gemspec
+++ b/mtg_sdk.gemspec
@@ -33,4 +33,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency "multi_xml", "~> 0.5"
   spec.add_dependency "faraday_middleware", "~> 0.10"
   spec.add_dependency "virtus", "~> 1.0"
+  spec.add_dependency "dry-types", "~> 1.5"
 end