diff --git a/docs/example.md b/docs/example.md
index d7c760e..171519b 100644
--- a/docs/example.md
+++ b/docs/example.md
@@ -14,7 +14,7 @@
   SupportsMultiple: false
 #}
 
-<blockquote data-{{ block.id }}>
+<blockquote class="{{ block.classes }}" data-{{ block.id }}>
     <p>{{ fields.testimonial }}</p>
     <cite>
       <span>{{ fields.author }}</span>
diff --git a/docs/installation.md b/docs/installation.md
index fcd2ddb..6872181 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -13,4 +13,8 @@ composer require "palmiak/timber-acf-wp-blocks"
 
 Next you can create your blocks in your theme in **views/blocks** folder (you can change it with a filter).
 
+> **Note**: filenames should only contain lowercase alphanumeric characters and dashes, and must begin with a letter.
+
+
+
 When you have your blocks ready the only thing left it to create a New group in ACF and select your block in **Show this field group if** selector.
\ No newline at end of file
diff --git a/timber-acf-wp-blocks.php b/timber-acf-wp-blocks.php
index 480b996..1c50cf4 100644
--- a/timber-acf-wp-blocks.php
+++ b/timber-acf-wp-blocks.php
@@ -191,7 +191,7 @@ function () {
  */
 function timber_blocks_callback( $block, $content = '', $is_preview = false, $post_id = 0 ) {
 	// Set up the slug to be useful.
-	$context = Timber::get_context();
+	$context = \Timber::get_context();
 	$slug    = str_replace( 'acf/', '', $block['name'] );
 
 	$context['block']      = $block;
@@ -199,11 +199,11 @@ function timber_blocks_callback( $block, $content = '', $is_preview = false, $po
 	$context['slug']       = $slug;
 	$context['is_preview'] = $is_preview;
 	$context['fields']     = get_fields();
-	$classes               = array(
-		$slug,
-		isset( $block['className'] ) ? $block['className'] : null,
-		$is_preview ? 'is-preview' : null,
-		'align' . $context['block']['align'],
+	$classes               = array_merge(
+		array( $slug ),
+		isset( $block['className'] ) ? array( $block['className'] ) : array(),
+		$is_preview ? array( 'is-preview' ) : array(),
+		array( 'align' . $context['block']['align'] ),
 	);
 
 	$context['classes'] = implode( ' ', $classes );
@@ -221,7 +221,7 @@ function timber_blocks_callback( $block, $content = '', $is_preview = false, $po
 
 	$paths = timber_acf_path_render( $slug, $is_preview, $is_example );
 
-	Timber::render( $paths, $context );
+	\Timber::render( $paths, $context );
 }
 
 /**
@@ -258,7 +258,7 @@ function timber_blocks_subdirectories( $directories ) {
 	$ret = array();
 
 	foreach ( $directories as $base_directory ) {
-		$template_directory = new \RecursiveDirectoryIterator( \locate_template( $base_directory ), FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_SELF );
+		$template_directory = new \RecursiveDirectoryIterator( \locate_template( $base_directory ), \FilesystemIterator::KEY_AS_PATHNAME | \FilesystemIterator::CURRENT_AS_SELF );
 
 		if ( $template_directory ) {
 			foreach ( $template_directory as $directory ) {