diff --git a/app/models/dmsf_folder.rb b/app/models/dmsf_folder.rb
index 45199de4..50cc8489 100644
--- a/app/models/dmsf_folder.rb
+++ b/app/models/dmsf_folder.rb
@@ -43,7 +43,7 @@ class DmsfFolder < ActiveRecord::Base
   has_many :locks, -> { where(entity_type:  1).order("#{DmsfLock.table_name}.updated_at DESC") },
     :class_name => 'DmsfLock', :foreign_key => 'entity_id', :dependent => :destroy
 
-  INVALID_CHARACTERS = /\A[^\/\\\?":<>#%\*]*\z/.freeze
+  INVALID_CHARACTERS = /\A[^\[\]\/\\\?":<>#%\*]*\z/.freeze
   STATUS_DELETED = 1.freeze
   STATUS_ACTIVE = 0.freeze
   AVAILABLE_COLUMNS = %w(id title extension size modified version workflow author).freeze
diff --git a/lib/redmine_dmsf/webdav/project_resource.rb b/lib/redmine_dmsf/webdav/project_resource.rb
index dfce0434..c6b93eff 100644
--- a/lib/redmine_dmsf/webdav/project_resource.rb
+++ b/lib/redmine_dmsf/webdav/project_resource.rb
@@ -115,9 +115,6 @@ module RedmineDmsf
       def project_id
 	      self.project.id if self.project
       end
-      
-      # Characters that MATCH this regex will be replaced with dots, no more than one dot in a row.
-      INVALID_CHARACTERS = /[\/\\\?":<>#%\*]/.freeze # = / \ ? " : < > # % *
 
       def self.create_project_name(p)
         use_project_names = Setting.plugin_redmine_dmsf['dmsf_webdav_use_project_names']
@@ -125,7 +122,7 @@ module RedmineDmsf
           # 1. Invalid characters are replaced with a dot.
           # 2. Two or more dots in a row are replaced with a single dot.
           # (3. Windows WebClient does not like a dot at the end, but since the project id tag is appended this is not a problem.)
-          "#{p.name.gsub(INVALID_CHARACTERS, ".").gsub(/\.{2,}/, ".")} [#{p.id}]" unless p.nil?
+          "#{p.name.gsub(DmsfFolder.INVALID_CHARACTERS, ".").gsub(/\.{2,}/, '.')} #{p.id}" unless p.nil?
         else
           p.identifier unless p.nil?
         end