diff --git a/external_modules.txt b/external_modules.txt
index 872e736ad..cf1b292a4 100644
--- a/external_modules.txt
+++ b/external_modules.txt
@@ -4,7 +4,7 @@ duritong/puppet-sysctl
 joshuabaird/puppet-ipaclient
 nanliu/puppet-staging
 puppetlabs/puppetlabs-apache
-puppetlabs/puppetlabs-apt
+puppetlabs/puppetlabs-apt,3.0.0
 puppetlabs/puppetlabs-concat,3.0.0
 puppetlabs/puppetlabs-firewall
 puppetlabs/puppetlabs-inifile