diff --git a/Puppetfile b/Puppetfile
index bda67e44a..b1d2d64e0 100644
--- a/Puppetfile
+++ b/Puppetfile
@@ -156,7 +156,7 @@ mod 'apt',
 
 mod 'concat',
   :git => 'https://github.com/puppetlabs/puppetlabs-concat',
-  :ref => 'v9.0.0'
+  :ref => 'v9.0.1'
 
 mod 'firewall',
   :git => 'https://github.com/puppetlabs/puppetlabs-firewall',