diff --git a/lib/puppet/functions/to_yaml.rb b/lib/puppet/functions/to_yaml.rb
index d5fe259..fe8ec50 100644
--- a/lib/puppet/functions/to_yaml.rb
+++ b/lib/puppet/functions/to_yaml.rb
@@ -1,22 +1,29 @@
 require 'yaml'
 # @summary
 #   Convert a data structure and output it as YAML
 #
-# @example how to output YAML
+# @example How to output YAML
 #   # output yaml to a file
 #     file { '/tmp/my.yaml':
 #       ensure  => file,
 #       content => to_yaml($myhash),
 #     }
+# @example Use options control the output format
+#   file { '/tmp/my.yaml':
+#     ensure  => file,
+#     content => to_yaml($myhash, {indentation: 4})
+#   }
 Puppet::Functions.create_function(:to_yaml) do
   # @param data
+  # @param options
   #
   # @return [String]
   dispatch :to_yaml do
     param 'Any', :data
+    optional_param 'Hash', :options
   end
 
-  def to_yaml(data)
-    data.to_yaml
+  def to_yaml(data, options = {})
+    data.to_yaml(options)
   end
 end
diff --git a/spec/functions/to_yaml_spec.rb b/spec/functions/to_yaml_spec.rb
index 4f9ae4b..eecb8a4 100644
--- a/spec/functions/to_yaml_spec.rb
+++ b/spec/functions/to_yaml_spec.rb
@@ -1,20 +1,22 @@
 require 'spec_helper'
 
 describe 'to_yaml' do
   it { is_expected.not_to eq(nil) }
   it { is_expected.to run.with_params('').and_return("--- ''\n") }
   it { is_expected.to run.with_params(true).and_return(%r{--- true\n}) }
   it { is_expected.to run.with_params('one').and_return(%r{--- one\n}) }
   it { is_expected.to run.with_params([]).and_return("--- []\n") }
   it { is_expected.to run.with_params(['one']).and_return("---\n- one\n") }
   it { is_expected.to run.with_params(['one', 'two']).and_return("---\n- one\n- two\n") }
   it { is_expected.to run.with_params({}).and_return("--- {}\n") }
   it { is_expected.to run.with_params('key' => 'value').and_return("---\nkey: value\n") }
   it {
     is_expected.to run.with_params('one' => { 'oneA' => 'A', 'oneB' => { 'oneB1' => '1', 'oneB2' => '2' } }, 'two' => ['twoA', 'twoB'])
                       .and_return("---\none:\n  oneA: A\n  oneB:\n    oneB1: '1'\n    oneB2: '2'\ntwo:\n- twoA\n- twoB\n")
   }
 
   it { is_expected.to run.with_params('‰').and_return("--- \"‰\"\n") }
   it { is_expected.to run.with_params('∇').and_return("--- \"∇\"\n") }
+
+  it { is_expected.to run.with_params({ 'foo' => { 'bar' => true, 'baz' => false } }, :indentation => 4).and_return("---\nfoo:\n    bar: true\n    baz: false\n") }
 end