diff --git a/Puppetfile b/Puppetfile
index 8637d6652..b16789acd 100644
--- a/Puppetfile
+++ b/Puppetfile
@@ -184,11 +184,11 @@ mod 'apache',
 
 mod 'apt',
   :git => 'https://github.com/puppetlabs/puppetlabs-apt',
-  :ref => '2.4.0'
+  :ref => '6.3.0'
 
 mod 'concat',
   :git => 'https://github.com/puppetlabs/puppetlabs-concat',
-  :ref => '2.2.1'
+  :ref => '5.3.0'
 
 mod 'firewall',
   :git => 'https://github.com/puppetlabs/puppetlabs-firewall',
diff --git a/external_modules.txt b/external_modules.txt
index 10638f584..76985702f 100644
--- a/external_modules.txt
+++ b/external_modules.txt
@@ -4,8 +4,8 @@ duritong/puppet-sysctl
 joshuabaird/puppet-ipaclient
 nanliu/puppet-staging
 puppetlabs/puppetlabs-apache
-puppetlabs/puppetlabs-apt,2.4.0
-puppetlabs/puppetlabs-concat,2.2.1
+puppetlabs/puppetlabs-apt
+puppetlabs/puppetlabs-concat
 puppetlabs/puppetlabs-firewall
 puppetlabs/puppetlabs-inifile,2.2.0
 puppetlabs/puppetlabs-mysql