diff --git a/database/migrations/1503248427886_token.js b/database/migrations/1503248427886_token.js
index ae9c948..fc65e46 100644
--- a/database/migrations/1503248427886_token.js
+++ b/database/migrations/1503248427886_token.js
@@ -7,7 +7,7 @@ class TokensSchema extends Schema {
     this.create('tokens', table => {
       table.increments()
       table.integer('user_id').unsigned().references('id').inTable('users')
-      table.string('token', 40).notNullable().unique()
+      table.string('token', 255).notNullable().unique().index()
       table.string('type', 80).notNullable()
       table.boolean('is_revoked').defaultTo(false)
       table.timestamps()