diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..693fe54
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Markdownify"]
+	path = Markdownify
+	url = git@github.com:Elephant418/Markdownify.git
diff --git a/Markdownify b/Markdownify
new file mode 160000
index 0000000..0160677
--- /dev/null
+++ b/Markdownify
@@ -0,0 +1 @@
+Subproject commit 0160677f04c784550dd10fd72fdf3994967db848
diff --git a/command.php b/command.php
index 0c79cf3..56260cf 100644
--- a/command.php
+++ b/command.php
@@ -1,5 +1,9 @@
 <?php
 
+require_once( dirname( __FILE__ ) . '/Markdownify/src/Parser.php' );
+require_once( dirname( __FILE__ ) . '/Markdownify/src/Converter.php' );
+require_once( dirname( __FILE__ ) . '/Markdownify/src/ConverterExtra.php' );
+
 if ( ! class_exists( 'WP_CLI' ) ) {
 	return;
 }
diff --git a/tests/test-dependencies.php b/tests/test-dependencies.php
new file mode 100644
index 0000000..13c632c
--- /dev/null
+++ b/tests/test-dependencies.php
@@ -0,0 +1,18 @@
+<?php
+class HH_Hugo_Test_Dependencies extends WP_UnitTestCase {
+	function test_installed() {
+		$this->assertTrue( function_exists( 'yaml_emit' ) );
+		$this->assertTrue( class_exists( '\\Markdownify\\ConverterExtra' ) );
+	}
+
+	function test_basic() {
+		// Basic Markdownify functionality
+		$converter = new Markdownify\ConverterExtra;
+		$markdown = $converter->parseString('<h1>Test</h1>');
+		$this->assertEquals( '# Test', $markdown );
+
+		// Basic YAML output
+		$yaml = yaml_emit( array( 'test' => 'test output', 'foo' => array( 'bar' ) ) );
+		$this->assertEquals( $yaml, "---\ntest: test output\nfoo:\n- bar\n...\n" );
+	}
+}