diff --git a/app/models/conference.rb b/app/models/conference.rb
index ca37e6d0..be3c36ad 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -115,7 +115,7 @@ class Conference < ApplicationRecord
   # Delete all EventSchedules that are not in the hours range
   # After the conference has been successfully updated
   def delete_event_schedules
-    if start_hour_changed? || end_hour_changed?
+    if saved_change_to_start_hour? || saved_change_to_end_hour?
       event_schedules = program.event_schedules.select do |event_schedule|
         event_schedule.start_time.hour < start_hour ||
         event_schedule.end_time.hour > end_hour ||
@@ -642,7 +642,7 @@ class Conference < ApplicationRecord
   def notify_on_dates_changed?
     return false unless email_settings.send_on_conference_dates_updated
     # do not notify unless one of the dates changed
-    return false unless start_date_changed? || end_date_changed?
+    return false unless saved_change_to_start_date? || saved_change_to_end_date?
 
     # do not notify unless the mail content is set up
     (email_settings.conference_dates_updated_subject.present? && email_settings.conference_dates_updated_body.present?)
@@ -659,7 +659,7 @@ class Conference < ApplicationRecord
     # do not notify unless we allow a registration
     return false unless registration_period
     # do not notify unless one of the dates changed
-    return false unless registration_period.start_date_changed? || registration_period.end_date_changed?
+    return false unless registration_period.saved_change_to_start_date? || registration_period.saved_change_to_end_date?
 
     # do not notify unless the mail content is set up
     (email_settings.conference_registration_dates_updated_subject.present? && email_settings.conference_registration_dates_updated_body.present?)
diff --git a/app/models/program.rb b/app/models/program.rb
index 0dadee15..8db24c6c 100644
--- a/app/models/program.rb
+++ b/app/models/program.rb
@@ -72,8 +72,8 @@ class Program < ApplicationRecord
 
   after_create :create_event_types
   after_create :create_difficulty_levels
-  after_save :unschedule_unfit_events, if: :schedule_interval_changed?
-  after_save :normalize_event_types_length, if: :schedule_interval_changed?
+  after_save :unschedule_unfit_events, if: :saved_change_to_schedule_interval?
+  after_save :normalize_event_types_length, if: :saved_change_to_schedule_interval?
   validate :check_languages_format
 
   # Returns all event_schedules for the selected schedule ordered by start_time
diff --git a/app/models/venue.rb b/app/models/venue.rb
index 592279ad..5abdcf96 100644
--- a/app/models/venue.rb
+++ b/app/models/venue.rb
@@ -37,7 +37,7 @@ class Venue < ApplicationRecord
   def notify_on_venue_changed?
     return false unless conference.try(:email_settings).try(:send_on_venue_updated)
     # do not notify unless the address changed
-    return false unless name_changed? || street_changed? || city_changed? || country_changed?
+    return false unless saved_change_to_name? || saved_change_to_street? || saved_change_to_city? || saved_change_to_country?
 
     # do not notify unless the mail content is set up
     (!conference.email_settings.venue_updated_subject.blank? && !conference.email_settings.venue_updated_body.blank?)