diff --git a/lib/noprocast.rb b/lib/noprocast.rb
index 16ac85f..9345182 100644
--- a/lib/noprocast.rb
+++ b/lib/noprocast.rb
@@ -25,6 +25,7 @@ class Noprocast
 			File.open("/etc/hosts", 'a') do |file|
 				file << "\n\n# noprocast start\n#{current_hosts.map { |host| "127.0.0.1 #{host}" }.join("\n")}\n# noprocast end"
 			end
+			system "dscacheutil -flushcache" # only for OSX >= 10.5: flush the DNS cache
 		end
 
 		def deactivate!
@@ -57,6 +58,7 @@ class Noprocast
 		end
 
 		def edit!
+			setup_deny_file_if_required!
 			editor = ENV['EDITOR'] || 'vi'
 			system "#{editor} #{deny_file_path}"
 		end
diff --git a/noprocast.gemspec b/noprocast.gemspec
index 2a7aa86..6588e8d 100644
--- a/noprocast.gemspec
+++ b/noprocast.gemspec
@@ -5,7 +5,7 @@
 
 Gem::Specification.new do |s|
   s.name = %q{noprocast}
-  s.version = "0.1.2"
+  s.version = "0.1.3"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Rob Watson"]