diff --git a/db/migrate/20150910135510_add_siorg_code_to_institution.rb b/db/migrate/20150910135510_add_siorg_code_to_institution.rb
new file mode 100644
index 0000000..83cdec5
--- /dev/null
+++ b/db/migrate/20150910135510_add_siorg_code_to_institution.rb
@@ -0,0 +1,9 @@
+class AddSiorgCodeToInstitution < ActiveRecord::Migration
+  def up
+    add_column :institutions, :siorg_code, :integer
+  end
+
+  def down
+    remove_column :institutions, :siorg_code
+  end
+end
diff --git a/lib/institution.rb b/lib/institution.rb
index b63c5d7..ee5e870 100644
--- a/lib/institution.rb
+++ b/lib/institution.rb
@@ -20,10 +20,9 @@ class Institution < ActiveRecord::Base
                   :sub_juridical_nature, :normalization_level,
                   :version, :cnpj, :type, :governmental_power,
                   :governmental_sphere, :sisp, :juridical_nature,
-                  :corporate_name
+                  :corporate_name, :siorg_code, :community
 
   validates :name, :presence=>true, :uniqueness=>true
-  validates :cnpj, :uniqueness=>true
 
   before_save :verify_institution_type
 
diff --git a/lib/private_institution.rb b/lib/private_institution.rb
index 1ee0f70..43c554a 100644
--- a/lib/private_institution.rb
+++ b/lib/private_institution.rb
@@ -1,3 +1,3 @@
 class PrivateInstitution < Institution
-  validates :cnpj, :uniqueness=>true, :allow_nil=>true, :allow_blank=>true
+  validates :cnpj, :allow_nil=>true, :allow_blank=>true
 end
diff --git a/lib/public_institution.rb b/lib/public_institution.rb
index 84ade57..33d13eb 100644
--- a/lib/public_institution.rb
+++ b/lib/public_institution.rb
@@ -5,8 +5,6 @@ class PublicInstitution < Institution
   validates :acronym, :allow_blank => true, :allow_nil => true,
             :uniqueness=>true
 
-  validates :cnpj, :uniqueness=>true
-
   validates_format_of(
     :cnpj,
     :with => /^\d{2}\.\d{3}\.\d{3}\/\d{4}\-\d{2}$/,
--
libgit2 0.21.2