diff --git a/Puppetfile_extras b/Puppetfile_extras
index 2db1bb2c8..0b6c3b2e9 100644
--- a/Puppetfile_extras
+++ b/Puppetfile_extras
@@ -3,7 +3,7 @@
 
 mod 'haproxy',
   :git => 'https://github.com/puppetlabs/puppetlabs-haproxy',
-  :ref => 'master'
+  :ref => 'v4.2.1'
 
 mod 'tomcat',
   :git => 'https://github.com/puppetlabs/puppetlabs-tomcat',