diff --git a/db/migrate/20180930205254_add_variables_to_users.rb b/db/migrate/20180930205254_add_variables_to_users.rb
index 812f5a7e2..2317f4e86 100644
--- a/db/migrate/20180930205254_add_variables_to_users.rb
+++ b/db/migrate/20180930205254_add_variables_to_users.rb
@@ -1,18 +1,16 @@
 # frozen_string_literal: true
 
 class AddVariablesToUsers < ActiveRecord::Migration[5.1]
+  VARIABLES = {
+    export_vars: {
+      num_of_export_all_last_24_hours: 0
+    }
+  }.freeze
+
   def up
     add_column :users, :variables, :jsonb, default: {}, null: false
-
-    User.find_each do |user|
-      variables = {
-        export_vars: {
-          num_of_export_all_last_24_hours: 0
-        }
-      }
-
-      user.update(variables: variables)
-    end
+    User.reset_column_information
+    User.update_all(variables: VARIABLES)
   end
 
   def down