diff --git a/bulk_data_methods.gemspec b/bulk_data_methods.gemspec
index a3004a9..d86de5d 100644
--- a/bulk_data_methods.gemspec
+++ b/bulk_data_methods.gemspec
@@ -15,8 +15,8 @@ Gem::Specification.new do |s|
   s.require_path = 'lib'
   s.homepage     = 'http://github.com/fiksu/bulk_data_methods'
   s.add_dependency "pg"
-  s.add_dependency "activerecord", '>= 3.0', '< 5.0'
-  s.add_development_dependency "rails", '>= 3.0', '< 5.0'
+  s.add_dependency "activerecord", '>= 3.0'#, '< 5.0'
+  s.add_development_dependency "rails", '>= 3.0'
   s.add_development_dependency "rspec-rails"
   s.add_development_dependency "activeresource", '>= 3.0.0'
 end
diff --git a/lib/bulk_data_methods/mixin.rb b/lib/bulk_data_methods/mixin.rb
index eb813d6..4ee83a9 100644
--- a/lib/bulk_data_methods/mixin.rb
+++ b/lib/bulk_data_methods/mixin.rb
@@ -1,4 +1,3 @@
-
 module BulkDataMethods
 
   # exception thrown when row data structures are inconsistent between rows in single call to {#create_many} or {#update_many}
@@ -105,7 +104,7 @@ def create_many(rows, options = {})
               end
             end
             column_values = column_names.map do |column_name|
-              quote_value(row[column_name], columns_hash[column_name.to_s])
+              connection.quote(row[column_name], columns_hash[column_name.to_s])
             end.join(',')
             "(#{column_values})"
           end.each_slice(options[:slice_size]) do |insert_slice|
@@ -236,9 +235,17 @@ def update_many(rows, options = {})
                 column_name = column_name.to_s
                 columns_hash_value = columns_hash[column_name]
                 if i == 0
-                  "#{quote_value(column_value, columns_hash_value)}::#{columns_hash_value.sql_type} as #{column_name}"
+                  if columns_hash_value.sql_type=="jsonb" && !column_value.nil? && !column_value!='NULL'
+                    "'#{connection.quote(column_value)}'::#{columns_hash_value.sql_type} as #{column_name}"
+                  else
+                    "#{connection.quote(column_value)}::#{columns_hash_value.sql_type} as #{column_name}"
+                  end
                 else
-                  quote_value(column_value, columns_hash_value)
+                  if columns_hash_value.sql_type=="jsonb" && !column_value.nil? && !column_value!='NULL'
+                    "'#{connection.quote(column_value)}'"
+                  else
+                    connection.quote(column_value)
+                  end
                 end
               end.join(',')
             end
@@ -257,7 +264,8 @@ def update_many(rows, options = {})
               #{eval(returning_clause)}
             SQL
             sql = sql_update_string
-#puts "SQL> #{sql}"            
+#binding.pry
+#puts "SQL> #{sql}"
             returning += find_by_sql(sql_update_string)
           end
         end
diff --git a/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql/quoting.rb b/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql/quoting.rb
new file mode 100644
index 0000000..86132d3
--- /dev/null
+++ b/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql/quoting.rb
@@ -0,0 +1,21 @@
+# module ActiveRecord
+#   module ConnectionAdapters
+#     module PostgreSQL
+#       module Quoting
+#
+#         private
+#         # ****** BEGIN PATCH ******
+#         # when column of postgresql is an array, call super and fail. for example with [2] or ["2"].
+#         # add condition for array elswhere call super
+#         # @param [Value]
+#         def _quote(value)
+#           case value
+#             when Array      then "'{#{value.join(',')}}'"
+#             else
+#               super
+#           end
+#         end
+#       end
+#     end
+#   end
+# end
\ No newline at end of file
diff --git a/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql_adapter.rb b/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql_adapter.rb
index 4864cc0..e2aa765 100644
--- a/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql_adapter.rb
+++ b/lib/bulk_data_methods/patches/active_record/connection_adapters/postgresql_adapter.rb
@@ -1,11 +1,28 @@
 require 'active_record'
 require 'active_record/connection_adapters/abstract_adapter'
 require 'active_record/connection_adapters/postgresql_adapter'
+require 'active_record/connection_adapters/postgresql/quoting'
 
 module ActiveRecord
 
   module ConnectionAdapters
-
+    module PostgreSQL
+      module Quoting
+
+        private
+        # ****** BEGIN PATCH ******
+        # when column of postgresql is an array, call super and fail. for example with [2] or ["2"].
+        # add condition for array elswhere call super
+        # @param [Value]
+        def _quote(value)
+          case value
+            when Array      then "'{#{value.join(',')}}'"
+            else
+              super
+          end
+        end
+      end
+    end
     # Patches extending the postgres adapter with new operations for managing
     # sequences (and sets of sequence values).
     #
diff --git a/lib/bulk_data_methods/version.rb b/lib/bulk_data_methods/version.rb
index 21c55d6..e3d88fa 100644
--- a/lib/bulk_data_methods/version.rb
+++ b/lib/bulk_data_methods/version.rb
@@ -1,3 +1,3 @@
 module BulkDataMethods
-  VERSION = "3.0.1"
+  VERSION = "3.0.5"
 end