diff --git a/lib/generators/rating/templates/db/migrate/create_rate_table.rb b/lib/generators/rating/templates/db/migrate/create_rate_table.rb
index ae8336f..7d5dcc8 100644
--- a/lib/generators/rating/templates/db/migrate/create_rate_table.rb
+++ b/lib/generators/rating/templates/db/migrate/create_rate_table.rb
@@ -7,11 +7,15 @@ class CreateRateTable < ActiveRecord::Migration[5.0]
 
       t.references :author,    index: true, null: false, polymorphic: true
       t.references :resource,  index: true, null: false, polymorphic: true
-      t.references :scopeable, index: true, null: true, polymorphic: true
+      t.references :scopeable, index: true, null: true,  polymorphic: true
 
       t.timestamps null: false
     end
 
+    change_column :rating_rates, :author_type,    :string, limit: 10
+    change_column :rating_rates, :resource_type,  :string, limit: 10
+    change_column :rating_rates, :scopeable_type, :string, limit: 10
+
     add_index :rating_rates, %i[author_type author_id resource_type resource_id scopeable_type scopeable_id],
       name:   :index_rating_rates_on_author_and_resource_and_scopeable,
       unique: true
diff --git a/lib/generators/rating/templates/db/migrate/create_rating_table.rb b/lib/generators/rating/templates/db/migrate/create_rating_table.rb
index d927dd4..9afe1b0 100644
--- a/lib/generators/rating/templates/db/migrate/create_rating_table.rb
+++ b/lib/generators/rating/templates/db/migrate/create_rating_table.rb
@@ -14,6 +14,9 @@ class CreateRatingTable < ActiveRecord::Migration[5.0]
       t.timestamps null: false
     end
 
+    change_column :rating_ratings, :resource_type,  :string, limit: 10
+    change_column :rating_ratings, :scopeable_type, :string, limit: 10
+
     add_index :rating_ratings, %i[resource_type resource_id scopeable_type scopeable_id],
       name:   :index_rating_rating_on_resource_and_scopeable,
       unique: true