diff --git a/lib/openapi_contracts/parser.rb b/lib/openapi_contracts/parser.rb
index 41c22b4..1bed63c 100644
--- a/lib/openapi_contracts/parser.rb
+++ b/lib/openapi_contracts/parser.rb
@@ -2,7 +2,7 @@ module OpenapiContracts
   class Parser
     autoload :Transformers, 'openapi_contracts/parser/transformers'
 
-    TRANSFORMERS = [Transformers::Nullable, Transformers::Pointer].freeze
+    TRANSFORMERS = [Transformers::Pointer].freeze
 
     def self.call(dir, filename)
       new(dir.join(filename)).parse
diff --git a/lib/openapi_contracts/parser/transformers/nullable.rb b/lib/openapi_contracts/parser/transformers/nullable.rb
deleted file mode 100644
index fac0a0f..0000000
--- a/lib/openapi_contracts/parser/transformers/nullable.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-module OpenapiContracts::Parser::Transformers
-  class Nullable < Base
-    def call(object)
-      return unless object['type'].present? && object['nullable'] == true
-
-      object.delete('nullable')
-      object['type'] = [object['type'], 'null']
-    end
-  end
-end