diff --git a/Puppetfile b/Puppetfile
index a23f3e946..1277683d9 100644
--- a/Puppetfile
+++ b/Puppetfile
@@ -212,7 +212,7 @@ mod 'rsync',
 
 mod 'stdlib',
   :git => 'https://github.com/puppetlabs/puppetlabs-stdlib',
-  :ref => 'v6.5.0'
+  :ref => 'v6.6.0'
 
 mod 'vcsrepo',
   :git => 'https://github.com/puppetlabs/puppetlabs-vcsrepo',