diff --git a/metadata.rb b/metadata.rb
index 8df7320..91f9c91 100644
--- a/metadata.rb
+++ b/metadata.rb
@@ -1,7 +1,7 @@
 name 'postfix'
 maintainer 'Chef Software, Inc.'
 maintainer_email 'cookbooks@chef.io'
-license 'Apache 2.0'
+license 'Apache-2.0'
 description 'Installs and configures postfix for client or outbound relayhost, or to do SASL auth'
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
 version '5.0.1'