diff --git a/README.rdoc b/README.rdoc
index 4eb229e..f8f2028 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -7,6 +7,12 @@ It allows to customize workflow by defining own rules for issues processing. It'
 * To raise custom errors which will display to user, if he does something wrong;
 * To do anything that conforms to your needs;
 
+== Thanks to
+
+Plugin development is supported by DOM Digital Online Media GmbH
+
+http://www.dom.de
+
 == Installation
 
 From a ZIP file:
@@ -89,10 +95,11 @@ Do not forget to check whether issue is just created. Here we create the new iss
 
 == Compatibility
 
-This plug-in is compatible with Redmine 1.2.x, 1.3.x, 1.4.x, 2.0.x, 2.1.x
+This plug-in is compatible with Redmine 1.2.x, 1.3.x, 1.4.x, 2.x.x
 
 == Changelog
 
+[0.0.5] Compatibility with latest versions of Redmine 2.x.x
 [0.0.4] * Added ability to enable workflows globally for all projects. No need to enable 'Custom workflows' project module anymore. Just go to the 'Administration' -> 'Custom workflows' section and enable or disable your workflows in one place.
         * Fixed bug with 'Status transition prohibited' when updating the issue status by the repository commit
 [0.0.3] Compatibility with 1.2.x, 1.3.x
diff --git a/db/migrate/20110915084858_create_custom_workflows.rb b/db/migrate/20110915084858_create_custom_workflows.rb
index 4db4e7d..0f2f9f1 100644
--- a/db/migrate/20110915084858_create_custom_workflows.rb
+++ b/db/migrate/20110915084858_create_custom_workflows.rb
@@ -2,7 +2,7 @@ class CreateCustomWorkflows < ActiveRecord::Migration
   def self.up
     create_table :custom_workflows, :force => true do |t|
       t.references :project
-      t.text :script
+      t.text :script, :null => true, :default => nil
       t.boolean :is_enabled
     end
     add_index :custom_workflows, [:project_id], :unique => true
diff --git a/db/migrate/20120601054047_alter_custom_workflows.rb b/db/migrate/20120601054047_alter_custom_workflows.rb
index 92db4b2..84fdf31 100644
--- a/db/migrate/20120601054047_alter_custom_workflows.rb
+++ b/db/migrate/20120601054047_alter_custom_workflows.rb
@@ -2,8 +2,8 @@ class AlterCustomWorkflows < ActiveRecord::Migration
   def self.up
     remove_column :custom_workflows, :project_id
     remove_column :custom_workflows, :is_enabled
-    add_column :custom_workflows, :name, :string, :null => false, :default => ""
-    add_column :custom_workflows, :description, :string, :null => false, :default => ""
+    add_column :custom_workflows, :name, :string, :null => false, :default => ''
+    add_column :custom_workflows, :description, :string, :null => false, :default => ''
     add_column :custom_workflows, :position, :integer, :null => false, :default => 1
   end
 
diff --git a/db/migrate/20120628060102_change_custom_workflows_description_type.rb b/db/migrate/20120628060102_change_custom_workflows_description_type.rb
index c00d12c..1694f56 100644
--- a/db/migrate/20120628060102_change_custom_workflows_description_type.rb
+++ b/db/migrate/20120628060102_change_custom_workflows_description_type.rb
@@ -1,9 +1,9 @@
 class ChangeCustomWorkflowsDescriptionType < ActiveRecord::Migration
   def self.up
-    change_column :custom_workflows, :description, :text, :null => false, :default => ""
+    change_column :custom_workflows, :description, :text, :null => true, :default => nil
   end
 
   def self.down
-    change_column :custom_workflows, :description, :string, :null => false, :default => ""
+    change_column :custom_workflows, :description, :string, :null => false, :default => ''
   end
 end
diff --git a/db/migrate/20120908085222_add_after_save_to_custom_workflows.rb b/db/migrate/20120908085222_add_after_save_to_custom_workflows.rb
index 7c3009b..7211212 100644
--- a/db/migrate/20120908085222_add_after_save_to_custom_workflows.rb
+++ b/db/migrate/20120908085222_add_after_save_to_custom_workflows.rb
@@ -1,8 +1,8 @@
 class AddAfterSaveToCustomWorkflows < ActiveRecord::Migration
   def self.up
     rename_column :custom_workflows, :script, :before_save
-    change_column :custom_workflows, :before_save, :text, :null => false, :default => ""
-    add_column :custom_workflows, :after_save, :text, :null => false, :default => "", :after => :before_save
+    change_column :custom_workflows, :before_save, :text, :null => true
+    add_column :custom_workflows, :after_save, :text, :null => true, :after => :before_save
   end
   def self.down
     remove_column :custom_workflows, :after_save
diff --git a/init.rb b/init.rb
index 5bb74ef..829ccec 100644
--- a/init.rb
+++ b/init.rb
@@ -27,7 +27,7 @@ Redmine::Plugin.register :redmine_custom_workflows do
   name 'Redmine Custom Workflow plugin'
   author 'Anton Argirov'
   description 'Allows to create custom workflows for issues, defined in the plain Ruby language'
-  version '0.0.4'
+  version '0.0.5'
   url 'http://redmine.academ.org'
 
   menu :admin_menu, :custom_workflows, {:controller => 'custom_workflows', :action => 'index'}, :caption => :label_custom_workflow_plural