diff --git a/metadata.rb b/metadata.rb
index 523729a..fa025ba 100644
--- a/metadata.rb
+++ b/metadata.rb
@@ -13,6 +13,6 @@
 source_url 'https://github.com/vinted/chef-proxysql'
 issues_url 'https://github.com/vinted/chef-proxysql/issues'
 
-supports centos
-supports redhat
-supports rocky
+supports 'centos'
+supports 'redhat'
+supports 'rocky'