diff --git a/.travis.yml b/.travis.yml
index 2ace80f..9a6e0fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,19 +5,27 @@ services:
   - postgresql
 
 rvm:
-  - 2.2.0
+  - 2.2.2
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
 
 gemfile:
   - $REDMINE_PATH/Gemfile
 
 env:
-  - REDMINE_VER=3.1.6 DB=mysql
-  - REDMINE_VER=3.2.3 DB=mysql
-  - REDMINE_VER=3.3.0 DB=mysql
-
-  - REDMINE_VER=3.1.6 DB=postgresql
-  - REDMINE_VER=3.2.3 DB=postgresql
-  - REDMINE_VER=3.3.0 DB=postgresql
+  - REDMINE_VER=4.0.0 DB=mysql
+  - REDMINE_VER=4.0.1 DB=mysql
+  - REDMINE_VER=4.0.2 DB=mysql
+  - REDMINE_VER=4.0.3 DB=mysql
+  - REDMINE_VER=4.0.4 DB=mysql
+
+  - REDMINE_VER=4.0.0 DB=postgresql
+  - REDMINE_VER=4.0.1 DB=postgresql
+  - REDMINE_VER=4.0.2 DB=postgresql
+  - REDMINE_VER=4.0.3 DB=postgresql
+  - REDMINE_VER=4.0.4 DB=postgresql
 
 before_install:
   - export PLUGIN_NAME=redmine_custom_reports
@@ -28,9 +36,9 @@ before_install:
   - cd $REDMINE_PATH
 
 before_script:
-  - bundle exec rake db:create
-  - bundle exec rake db:migrate
-  - bundle exec rake redmine:plugins:migrate
+  - bundle exec rails db:create
+  - bundle exec rails db:migrate
+  - bundle exec rails redmine:plugins:migrate
 
 script:
   - bundle exec ruby plugins/$PLUGIN_NAME/test/**/*_test.rb
diff --git a/app/controllers/custom_reports_controller.rb b/app/controllers/custom_reports_controller.rb
index 7b53775..ebb41b9 100644
--- a/app/controllers/custom_reports_controller.rb
+++ b/app/controllers/custom_reports_controller.rb
@@ -1,11 +1,11 @@
 class CustomReportsController < ApplicationController
   unloadable
 
-  before_filter :find_project_by_project_id
-  before_filter :authorize
-  before_filter :find_custom_reports, only: [:index, :show, :new, :edit]
-  before_filter :find_custom_report, only: [:show, :edit, :update, :destroy]
-  before_filter :authorize_to_manage, only: [:edit, :update, :destroy]
+  before_action :find_project_by_project_id
+  before_action :authorize
+  before_action :find_custom_reports, only: [:index, :show, :new, :edit]
+  before_action :find_custom_report, only: [:show, :edit, :update, :destroy]
+  before_action :authorize_to_manage, only: [:edit, :update, :destroy]
 
   helper :queries
   include QueriesHelper
diff --git a/db/migrate/20121212125001_create_custom_reports.rb b/db/migrate/20121212125001_create_custom_reports.rb
index 0f4d54f..514c744 100644
--- a/db/migrate/20121212125001_create_custom_reports.rb
+++ b/db/migrate/20121212125001_create_custom_reports.rb
@@ -1,4 +1,4 @@
-class CreateCustomReports < ActiveRecord::Migration
+class CreateCustomReports < ActiveRecord::Migration[4.2]
   def self.up
     unless table_exists? :custom_reports
       create_table :custom_reports do |t|
diff --git a/db/migrate/20121212125002_create_custom_report_series.rb b/db/migrate/20121212125002_create_custom_report_series.rb
index 9f06771..ed2fcee 100644
--- a/db/migrate/20121212125002_create_custom_report_series.rb
+++ b/db/migrate/20121212125002_create_custom_report_series.rb
@@ -1,4 +1,4 @@
-class CreateCustomReportSeries < ActiveRecord::Migration
+class CreateCustomReportSeries < ActiveRecord::Migration[4.2]
   def self.up
     unless table_exists? :custom_report_series
       create_table :custom_report_series do |t|
diff --git a/db/migrate/20121212125003_remove_filters_from_custom_reports.rb b/db/migrate/20121212125003_remove_filters_from_custom_reports.rb
index ea25177..ae2baa9 100644
--- a/db/migrate/20121212125003_remove_filters_from_custom_reports.rb
+++ b/db/migrate/20121212125003_remove_filters_from_custom_reports.rb
@@ -1,4 +1,4 @@
-class RemoveFiltersFromCustomReports < ActiveRecord::Migration
+class RemoveFiltersFromCustomReports < ActiveRecord::Migration[4.2]
   def self.up
     if column_exists? :custom_reports, :filters
       remove_column :custom_reports, :filters
diff --git a/lib/redmine_custom_reports.rb b/lib/redmine_custom_reports.rb
index 1a15c5f..553ee10 100644
--- a/lib/redmine_custom_reports.rb
+++ b/lib/redmine_custom_reports.rb
@@ -1,4 +1,4 @@
-ActionDispatch::Callbacks.to_prepare do
+ActiveSupport::Reloader.to_prepare do
 
   # Requiring plugin's controller and model
   require_dependency 'custom_report'