diff --git a/lib/two_factor_authentication.rb b/lib/two_factor_authentication.rb
index 1f7b342..524a58f 100644
--- a/lib/two_factor_authentication.rb
+++ b/lib/two_factor_authentication.rb
@@ -5,7 +5,6 @@ require "active_model"
 require "active_record"
 require "active_support/core_ext/class/attribute_accessors"
 require "cgi"
-require "rotp"
 
 module Devise
   mattr_accessor :max_login_attempts
diff --git a/lib/two_factor_authentication/models/two_factor_authenticatable.rb b/lib/two_factor_authentication/models/two_factor_authenticatable.rb
index dcfc1ae..9999554 100644
--- a/lib/two_factor_authentication/models/two_factor_authenticatable.rb
+++ b/lib/two_factor_authentication/models/two_factor_authenticatable.rb
@@ -1,4 +1,6 @@
 require 'two_factor_authentication/hooks/two_factor_authenticatable'
+require 'rotp'
+
 module Devise
   module Models
     module TwoFactorAuthenticatable