diff --git a/Gemfile b/Gemfile
index 958dd05..c80ee36 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,16 +1,3 @@
 source "http://rubygems.org"
 
-# Specify your gem's dependencies in mini_record.gemspec
-gem 'rake'
-gem 'minitest'
-gem 'sqlite3'
-gem 'mysql2'
-gem 'mysql'
-gem 'pg'
-gem 'activerecord', '<= 3.2'
-
-group :test do
-  gem 'foreigner', '>= 1.4.2'
-end
-
 gemspec
diff --git a/README.md b/README.md
index f59c4c7..f52d4b4 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,31 @@ class Fox < ActiveRecord::Base
 end
 ```
 
+## Versions
+
+### ActiveRecord 4.0.5 or lower
+
+If you are using ruby 2.1 and activerecord lower than or equal to 4.0.5 please
+use [fork-stable](https://github.com/acdcorp/mini_record/tree/fork-stable) or
+[0.3.7 tag/version](https://github.com/acdcorp/mini_record/tree/v0.3.7)
+
+### ActiveRecord >= 4.0.5 <= 4.2.10 and Ruby >= 2.3
+
+Please use this branch [0.3-acdcorp-stable](https://github.com/acdcorp/mini_record/tree/0.3-acdcorp-stable)
+
+
+### ActiveRecord 4.2.11 ruby 2.5.5 and 2.6.6
+
+Please use branch [0.3.11-acdcorp-activerecord4.2.11](https://github.com/acdcorp/mini_record/tree/0.3.11-acdcorp-activerecord4.2.11)
+
+## Development
+
+Master is the development branch of this gem for acdcorp because we can't
+change the official mini_record gem version unless we push our custom
+development.
+
+Current version support Rails 6.0.1
+
 ## Author
 
 DAddYE, you can follow me on twitter [@daddye](http://twitter.com/daddye) or take a look at my site [daddye.it](http://www.daddye.it)
diff --git a/lib/mini_record/auto_schema.rb b/lib/mini_record/auto_schema.rb
index fa63393..1c796bb 100644
--- a/lib/mini_record/auto_schema.rb
+++ b/lib/mini_record/auto_schema.rb
@@ -5,6 +5,7 @@ def self.included(base)
     end
 
     module ClassMethods
+
       def init_table_definition(connection)
         #connection.create_table(table_name) unless connection.table_exists?(table_name)
 
@@ -12,13 +13,14 @@ def init_table_definition(connection)
         when 1
           # Rails 3.2 and earlier
           ActiveRecord::ConnectionAdapters::TableDefinition.new(connection)
-        when 4
+        when 4, -5
           # Rails 4
           ActiveRecord::ConnectionAdapters::TableDefinition.new(connection.native_database_types, table_name, false, {})
         else
           raise ArgumentError,
             "Unsupported number of args for ActiveRecord::ConnectionAdapters::TableDefinition.new()"
         end
+
       end
 
       def schema_tables
@@ -72,14 +74,65 @@ def fields_in_db
         end
       end
 
+      def columns_hash
+        if mini_record_fake_columns
+          super.merge mini_record_fake_columns
+        else
+          super
+        end
+      end
+
+      def mini_record_columns
+        @@_mr_columns ||= {}
+        @@_mr_columns[table_name] ||= {}
+      end
+
+      def mini_record_fake_columns
+        @@_mr_fake_columns ||= {}
+        @@_mr_fake_columns[table_name] ||= {}
+      end
+
+      # Lookup for registered ActiveRecord Types
+      # This in important for rails 4 and 5 due to ActiveRecord converts
+      # columns into object with the column type. Types depends from Connection
+      # Adapter.
+      # activerecord/lib/active_record/type/
+      # active_record/connection_adapters
+      # initialize_type_map defined the available types depending of
+      # database adapter.
+      def lookup_cast_type(type)
+        connection.lookup_cast_type(type)
+      end
+
       def field(*args)
         return unless connection?
 
         options    = args.extract_options!
         type       = options.delete(:as) || options.delete(:type) || :string
         index      = options.delete(:index)
+        fake       = options.delete(:fake) || false
 
         args.each do |column_name|
+          # add it it the mini record columns for this table so we can access
+          # special fields like input_as, used by form builders
+          mini_record_columns[column_name] = options
+
+          if fake
+            # allow you to access the field on the instance object
+            attr_accessor column_name
+            # ActiveRecord 4.2.x maps columns into types.
+            # Create a column symbol as type produced
+            # undefined method `type_cast_from_database' for :[boolean|string]:Symbol
+            type = lookup_cast_type(type) if defined?(ActiveRecord::Type)
+            # create a column that column_hashes will understand (a fake row)
+            fake_column = ActiveRecord::ConnectionAdapters::Column.new(
+              column_name.to_s, nil, type, true
+            )
+            # add it to the list of fake columns for this table
+            mini_record_fake_columns[column_name.to_s] = fake_column
+            # skip everything else as it's a fake column and don't want it in the db
+            next
+          end
 
           # Allow custom types like:
           #   t.column :type, "ENUM('EMPLOYEE','CLIENT','SUPERUSER','DEVELOPER')"
diff --git a/lib/mini_record/version.rb b/lib/mini_record/version.rb
index a0881d2..92aac4b 100644
--- a/lib/mini_record/version.rb
+++ b/lib/mini_record/version.rb
@@ -1,3 +1,3 @@
 module MiniRecord
-  VERSION = "0.3.7"
+  VERSION = "0.3.10"
 end
diff --git a/mini_record.gemspec b/mini_record.gemspec
index ae7866b..eaf3784 100644
--- a/mini_record.gemspec
+++ b/mini_record.gemspec
@@ -24,5 +24,12 @@ Gem::Specification.new do |s|
 
   # specify any dependencies here; for example:
   # s.add_development_dependency "rspec"
-  s.add_dependency "activerecord", ">=3.2.0"
+  s.add_runtime_dependency "activerecord", '~> 6.1.0'
+
+  s.add_development_dependency 'rake'
+  s.add_development_dependency 'minitest'
+  s.add_development_dependency 'sqlite3'
+  s.add_development_dependency 'mysql2'
+  s.add_development_dependency 'pg'
+  s.add_development_dependency 'foreigner', '>= 1.4.2'
 end