diff --git a/composer.json b/composer.json
index 810931a..977abd6 100644
--- a/composer.json
+++ b/composer.json
@@ -26,6 +26,11 @@
 		"wpackagist-plugin/multiple-post-thumbnails": "~1.6"
 	},
 	"autoload": {
+		"classmap": [
+			"src/wp-twitter-cards.php",
+			"src/interface-twitter-card-player.php",
+			"src/twitter-card-youtube-player.php"
+		],
 		"files": ["wp-twitter-cards.php"]
 	}
 }
\ No newline at end of file
diff --git a/composer.lock b/composer.lock
index f0a9607..5ce4e9c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "9235976fc41fdc7f7d331b09afc8ea07",
+    "hash": "924a606cb0ef81855c98b38f95f10acd",
     "packages": [
         {
             "name": "composer/installers",