diff --git a/src/PatternLab/Data.php b/src/PatternLab/Data.php
index e0da3fc7..0ddee97d 100644
--- a/src/PatternLab/Data.php
+++ b/src/PatternLab/Data.php
@@ -125,7 +125,7 @@ public static function gather($options = array()) {
 			$pathName      = $file->getPathname();
 			$pathNameClean = str_replace($sourceDir."/","",$pathName);
 
-			if (!$hidden && (($ext == "json") || ($ext == "yaml"))) {
+			if (!$hidden && (($ext == "json") || ($ext == "yml") || ($ext == "yaml"))) {
 
 				if ($isListItems === false) {