diff --git a/manifests/init.pp b/manifests/init.pp
index f1d406f63..f5c4c1b2c 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -15,7 +15,7 @@
   $minimum_version                                                    = $collectd::params::minimum_version,
   $package_ensure                                                     = $collectd::params::package_ensure,
   $package_install_options                                            = $collectd::params::package_install_options,
-  String $package_keyserver                                           = $collectd::params::package_keyserver,
+  Stdlib::Fqdn $package_keyserver                                     = $collectd::params::package_keyserver,
   $package_name                                                       = $collectd::params::package_name,
   $package_provider                                                   = $collectd::params::package_provider,
   $plugin_conf_dir                                                    = $collectd::params::plugin_conf_dir,
diff --git a/metadata.json b/metadata.json
index 1ed45619c..662a96e92 100644
--- a/metadata.json
+++ b/metadata.json
@@ -91,7 +91,7 @@
   "dependencies": [
     {
       "name": "puppetlabs/stdlib",
-      "version_requirement": ">= 4.13.1 < 5.0.0"
+      "version_requirement": ">= 4.25.0 < 5.0.0"
     },
     {
       "name": "puppetlabs/concat",