diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index f584577557..5f226d56a2 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -49,8 +49,13 @@
     // needs to be a raw `StripeObject`.
     'self_accessor' => false,
 
-    // Visibility annotations are not supported by php5.6
-    'visibility_required' => false,
+    // Visibility for constants is not supported by php5.6
+    'visibility_required' => [
+        'elements' => [
+            'method',
+            'property',
+        ],
+    ],
 
     // Apparently "uninitialized" is distinct from "null" in some versions of PHP
     // so I am defensively disabling this rule so as to not cause breaking changes