diff --git a/app/controllers/epp_controller.rb b/app/controllers/epp_controller.rb
index f3ecdc78e..47fec1fea 100644
--- a/app/controllers/epp_controller.rb
+++ b/app/controllers/epp_controller.rb
@@ -84,7 +84,6 @@ class EppController < ApplicationController
   end
   # rubocop: enable Style/PredicateName
 
-
   def write_to_epp_log
     request_command = params[:command] || params[:action] # error receives :command, other methods receive :action
     ApiLog::EppLog.create({
diff --git a/app/models/epp/epp_domain.rb b/app/models/epp/epp_domain.rb
index c13cba887..e02760402 100644
--- a/app/models/epp/epp_domain.rb
+++ b/app/models/epp/epp_domain.rb
@@ -19,7 +19,8 @@ class Epp::EppDomain < Domain
         [:base, :ds_data_with_key_not_allowed],
         [:base, :ds_data_not_allowed],
         [:base, :key_data_not_allowed],
-        [:period, :not_a_number]
+        [:period, :not_a_number],
+        [:period, :not_an_integer]
       ],
       '2004' => [ # Parameter value range error
         [:nameservers, :out_of_range,
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 3ad01a110..8ed0fff1a 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -104,6 +104,7 @@ en:
             period:
               out_of_range: 'Period must add up to 1, 2 or 3 years'
               not_a_number: 'Period is not a number'
+              not_an_integer: 'Period must be an integer'
             auth_info:
               wrong_pw: 'Authorization error'
             domain_statuses: