diff --git a/manifests/init.pp b/manifests/init.pp
index d7340fc..f9dfb89 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -9,6 +9,9 @@
 #
 class mosquitto (
 ) {
+    # TODO: can drop this PPA once the service is running on Ubuntu 18.04
+    apt::ppa { 'ppa:mosquitto-dev/mosquitto-ppa': }
+
     package {'mosquitto':
       ensure => present,
     }
diff --git a/metadata.json b/metadata.json
index df72da9..1cf7006 100644
--- a/metadata.json
+++ b/metadata.json
@@ -27,6 +27,7 @@
     }
   ],
   "dependencies": [
-    { "name": "puppetlabs/stdlib", "version_requirement": ">= 4.0.0 <5.0.0" }
+    { "name": "puppetlabs/stdlib", "version_requirement": ">= 4.0.0 <5.0.0" },
+    { "name": "puppetlabs/apt", "version_requirement": ">= 2.3.0 <3.0.0" }
   ]
 }