diff --git a/app/controllers/dmsf_controller.rb b/app/controllers/dmsf_controller.rb
index 574487dc..9877bc64 100644
--- a/app/controllers/dmsf_controller.rb
+++ b/app/controllers/dmsf_controller.rb
@@ -227,7 +227,7 @@ class DmsfController < ApplicationController
   end
 
   def entries_email
-    if (Redmine::VERSION::MAJOR >= 3)
+    if (Rails::VERSION::MAJOR > 3)
       @email_params = e_params
     else
       @email_params = params[:email]
@@ -251,7 +251,7 @@ class DmsfController < ApplicationController
   end
 
   def create
-    if (Redmine::VERSION::MAJOR >= 3)
+    if (Rails::VERSION::MAJOR > 3)
       @folder = DmsfFolder.new(
         params.require(:dmsf_folder).permit(:title, :description, :dmsf_folder_id))
     else
diff --git a/app/controllers/dmsf_files_controller.rb b/app/controllers/dmsf_files_controller.rb
index 42fdbf1b..ede478ee 100644
--- a/app/controllers/dmsf_files_controller.rb
+++ b/app/controllers/dmsf_files_controller.rb
@@ -100,7 +100,7 @@ class DmsfFilesController < ApplicationController
       if @file.locked_for_user?
         flash[:error] = l(:error_file_is_locked)
       else
-        if (Redmine::VERSION::MAJOR >= 3)
+        if (Rails::VERSION::MAJOR > 3)
           aparams = frev_params
         else
           aparams = params
diff --git a/app/controllers/dmsf_links_controller.rb b/app/controllers/dmsf_links_controller.rb
index 55d8c263..c960128b 100644
--- a/app/controllers/dmsf_links_controller.rb
+++ b/app/controllers/dmsf_links_controller.rb
@@ -25,7 +25,7 @@ class DmsfLinksController < ApplicationController
   before_filter :authorize
 
   def new
-    if (Redmine::VERSION::MAJOR >= 3)
+    if (Rails::VERSION::MAJOR > 3)
       @dmsf_link = DmsfLink.new(l_params)
     else
       @dmsf_link = DmsfLink.new(:project_id => params[:project_id])
diff --git a/app/controllers/dmsf_upload_controller.rb b/app/controllers/dmsf_upload_controller.rb
index 6fcbddba..0c531d1e 100644
--- a/app/controllers/dmsf_upload_controller.rb
+++ b/app/controllers/dmsf_upload_controller.rb
@@ -52,7 +52,7 @@ class DmsfUploadController < ApplicationController
 
   # async single file upload handling 
   def upload_file
-    if (Redmine::VERSION::MAJOR >= 3)
+    if (Rails::VERSION::MAJOR > 3)
       @tempfile = params.require(:file)
     else
       @tempfile = params[:file]
@@ -86,7 +86,7 @@ class DmsfUploadController < ApplicationController
   end
   
   def commit_files
-    if (Redmine::VERSION::MAJOR >= 3)
+    if (Rails::VERSION::MAJOR > 3)
       commited_files = params.require(:commited_files)
     else
       commited_files = params[:commited_files]
diff --git a/app/models/dmsf_file.rb b/app/models/dmsf_file.rb
index 0f16dafc..062254b2 100644
--- a/app/models/dmsf_file.rb
+++ b/app/models/dmsf_file.rb
@@ -36,7 +36,7 @@ class DmsfFile < ActiveRecord::Base
   belongs_to :folder, :class_name => 'DmsfFolder', :foreign_key => 'dmsf_folder_id'
   belongs_to :deleted_by_user, :class_name => 'User', :foreign_key => 'deleted_by_user_id'
 
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     has_many :revisions, -> { order("#{DmsfFileRevision.table_name}.major_version DESC, #{DmsfFileRevision.table_name}.minor_version DESC, #{DmsfFileRevision.table_name}.updated_at DESC") },
       :class_name => 'DmsfFileRevision', :foreign_key => 'dmsf_file_id',
       :dependent => :destroy
@@ -57,11 +57,11 @@ class DmsfFile < ActiveRecord::Base
       :conditions => {:target_type => DmsfFile.model_name}, :dependent => :destroy
   end
 
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     accepts_nested_attributes_for :revisions, :locks, :referenced_links
   end
 
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     scope :visible, -> { where(deleted: false) }
     scope :deleted, -> { where(deleted: true) }
   else
diff --git a/app/models/dmsf_file_revision.rb b/app/models/dmsf_file_revision.rb
index e1ab603e..cfff5f74 100644
--- a/app/models/dmsf_file_revision.rb
+++ b/app/models/dmsf_file_revision.rb
@@ -26,13 +26,13 @@ class DmsfFileRevision < ActiveRecord::Base
   belongs_to :deleted_by_user, :class_name => 'User', :foreign_key => 'deleted_by_user_id'
   has_many :access, :class_name => 'DmsfFileRevisionAccess', :foreign_key => 'dmsf_file_revision_id', :dependent => :destroy
   has_many :dmsf_workflow_step_assignment, :dependent => :destroy
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     accepts_nested_attributes_for :access, :dmsf_workflow_step_assignment, :file, :user
   end
 
 
   # Returns a list of revisions that are not deleted here, or deleted at parent level either
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     scope :visible, -> { where(deleted: false) }
     scope :deleted, -> { where(deleted: true) }
   else
@@ -46,7 +46,7 @@ class DmsfFileRevision < ActiveRecord::Base
     :datetime => Proc.new {|o| o.updated_at },
     :description => Proc.new {|o| o.comment },
     :author => Proc.new {|o| o.user }
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     acts_as_activity_provider :type => 'dmsf_file_revisions',
       :timestamp => "#{DmsfFileRevision.table_name}.updated_at",
       :author_key => "#{DmsfFileRevision.table_name}.user_id",
diff --git a/app/models/dmsf_file_revision_access.rb b/app/models/dmsf_file_revision_access.rb
index 4a7859a4..6c32dd97 100644
--- a/app/models/dmsf_file_revision_access.rb
+++ b/app/models/dmsf_file_revision_access.rb
@@ -22,7 +22,7 @@ class DmsfFileRevisionAccess < ActiveRecord::Base
   belongs_to :user
   delegate :project, :to => :revision, :allow_nil => false
   delegate :file, :to => :revision, :allow_nil => false
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     accepts_nested_attributes_for :user, :revision
   end
 
@@ -34,7 +34,7 @@ class DmsfFileRevisionAccess < ActiveRecord::Base
     :datetime => Proc.new {|o| o.updated_at },
     :description => Proc.new {|o| o.revision.comment },
     :author => Proc.new {|o| o.user }    
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     acts_as_activity_provider :type => 'dmsf_file_revision_accesses',
       :timestamp => "#{DmsfFileRevisionAccess.table_name}.updated_at",
       :author_key => "#{DmsfFileRevisionAccess.table_name}.user_id",
diff --git a/app/models/dmsf_folder.rb b/app/models/dmsf_folder.rb
index 89e12fa4..6af3f809 100644
--- a/app/models/dmsf_folder.rb
+++ b/app/models/dmsf_folder.rb
@@ -34,7 +34,7 @@ class DmsfFolder < ActiveRecord::Base
     :dependent => :destroy
   has_many :files, :class_name => 'DmsfFile', :foreign_key => 'dmsf_folder_id',
     :dependent => :destroy
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     has_many :folder_links, -> { where target_type: DmsfFolder.model_name },
       :class_name => 'DmsfLink', :foreign_key => 'dmsf_folder_id', :dependent => :destroy
     has_many :file_links, -> { where target_type: DmsfFile.model_name },
@@ -61,7 +61,7 @@ class DmsfFolder < ActiveRecord::Base
       :dependent => :destroy
   end
 
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     scope :visible, -> { where(deleted: false) }
     scope :deleted, -> { where(deleted: true) }
   else
diff --git a/app/models/dmsf_link.rb b/app/models/dmsf_link.rb
index 0e7f9e36..dc49d6e1 100644
--- a/app/models/dmsf_link.rb
+++ b/app/models/dmsf_link.rb
@@ -40,7 +40,7 @@ class DmsfLink < ActiveRecord::Base
     end      
   end
 
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     scope :visible, -> { where(deleted: false) }
     scope :deleted, -> { where(deleted: true) }
   else
diff --git a/app/models/dmsf_workflow.rb b/app/models/dmsf_workflow.rb
index 8ec83d9c..625da0ce 100644
--- a/app/models/dmsf_workflow.rb
+++ b/app/models/dmsf_workflow.rb
@@ -19,7 +19,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class DmsfWorkflow < ActiveRecord::Base
-  if (Redmine::VERSION::MAJOR >= 3)
+  if (Rails::VERSION::MAJOR > 3)
     has_many :dmsf_workflow_steps, -> { order 'step ASC, operator DESC' }, :dependent => :destroy
   else
     has_many :dmsf_workflow_steps, :dependent => :destroy, :order => 'step ASC, operator DESC'
diff --git a/lib/redmine_dmsf/patches/project_patch.rb b/lib/redmine_dmsf/patches/project_patch.rb
index 15efdb59..086b76e4 100644
--- a/lib/redmine_dmsf/patches/project_patch.rb
+++ b/lib/redmine_dmsf/patches/project_patch.rb
@@ -32,7 +32,7 @@ module RedmineDmsf
           unloadable
           alias_method_chain :copy, :dmsf
 
-          if (Redmine::VERSION::MAJOR >= 3)
+          if (Rails::VERSION::MAJOR > 3)
             has_many :dmsf_files, -> { where dmsf_folder_id: nil},
               :class_name => 'DmsfFile', :foreign_key => 'project_id', :dependent => :destroy
             has_many :dmsf_folders, -> {where dmsf_folder_id: nil},