diff --git a/Guardfile b/Guardfile
index 2810f24..61a5767 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,6 +1,6 @@
 directories %w[app config spec]
 
-guard 'spork', rspec_env: { RAILS_ENV: 'test' } do
+guard :spork, rspec_env: { RAILS_ENV: 'test' } do
   watch('config/application.rb')
   watch('config/environment.rb')
   watch('config/routes.rb')
@@ -10,7 +10,7 @@ guard 'spork', rspec_env: { RAILS_ENV: 'test' } do
   watch(%r{^spec/support/.+\.rb$})
 end
 
-guard 'rspec', cmd: 'bundle exec rspec --drb -f doc' do
+guard :rspec, cmd: 'bundle exec rspec --drb -f doc' do
   watch(%r{^spec/.+_spec\.rb$})
 
   watch('spec/spec_helper.rb')        { 'spec' }