diff --git a/lib/puppet/type/debconf.rb b/lib/puppet/type/debconf.rb
index 203b75e..86ef82d 100644
--- a/lib/puppet/type/debconf.rb
+++ b/lib/puppet/type/debconf.rb
@@ -1,95 +1,95 @@
 # debconf.rb --- The debconf type
 
 Puppet::Type.newtype(:debconf) do
   desc <<-EOT
     Manage debconf database entries on Debian based systems. This type
     can either set or remove a value for a debconf database entry. It
     uses multiple programs from the 'debconf' package.
 
     Examples:
 
         debconf { 'tzdata/Areas':
           type  => 'select',
           value => 'Europe',
         }
 
         debconf { 'dash/sh':
           type  => 'boolean',
           value => 'true',
         }
 
         debconf { 'libraries/restart-without-asking':
           package => 'libc6',
           type    => 'boolean',
           value   => 'true',
           seen    => true,
         }
   EOT
 
   def munge_boolean(value)
     case value
-    when true, "true", :true
+    when true, 'true', :true
       :true
-    when false, "false", :false
+    when false, 'false', :false
       :false
     else
-      fail("munge_boolean only takes booleans")
+      raise(Puppet::Error, 'munge_boolean only takes booleans')
     end
   end
 
   ensurable do
     defaultvalues
     defaultto :present
   end
 
   newparam(:item, namevar: true) do
     desc "The item name. This string must have the following format: the
       package name, a literal slash char and the name of the question (e.g.
       'tzdata/Areas')."
 
     newvalues(%r{^[a-z0-9][a-z0-9:.+-]+\/[a-zA-Z0-9\/_.+-]+$})
   end
 
   newparam(:package) do
     desc "The package the item belongs to. The default is the first part (up
       to the first '/') of the item parameter (e.g. 'tzdata')."
 
     newvalues(%r{^[a-z0-9][a-z0-9:.+-]+$})
     defaultto { @resource[:item].split('/', 2).first }
   end
 
   newparam(:type) do
     desc "The type of the item. This can only be one of the following
       values: string, boolean, select, multiselect, note, text, password,
       title."
 
     newvalues(:string, :boolean, :select, :multiselect,
               :note, :text, :password, :title)
   end
 
   newproperty(:value) do
     desc "The value for the item (e.g. 'Europe')."
 
     newvalues(%r{\S})
     munge { |value| value.strip } # Remove leading and trailing spaces
   end
 
-  newproperty(:seen, :boolean => true) do
+  newproperty(:seen, boolean: true) do
     desc "The value of the 'seen' flag. This can be left undefined or be one
       of the boolean values true or false."
 
     newvalues(:true, :false)
 
     munge do |value|
       @resource.munge_boolean(value)
     end
   end
 
   validate do
     unless self[:type]
       unless self[:ensure].to_s == 'absent'
         raise(Puppet::Error, 'type is a required attribute')
       end
     end
   end
 end