diff --git a/mailchimp.module b/mailchimp.module
index 9452acb..36c5bbf 100644
--- a/mailchimp.module
+++ b/mailchimp.module
@@ -14,9 +14,9 @@ function mailchimp_libraries_info() {
     'vendor url' => 'http://apidocs.mailchimp.com/api/1.3',
     'download url' => 'http://apidocs.mailchimp.com/api/downloads/mailchimp-api-class.zip',
     'version arguments' => array(
-      'file' => 'README',
+      'file' => 'MCAPI.class.php',
       // Version 1.3
-      'pattern' => '/API Version: ((\d+)\.(\d+))/',
+      'pattern' => '/\$version = \"((\d+)\.(\d+))\"/',
     ),
     'files' => array(
       'php' => array('MCAPI.class.php'),