diff --git a/manifests/dns.pp b/manifests/dns.pp
index 6ddf6ab..a44648d 100644
--- a/manifests/dns.pp
+++ b/manifests/dns.pp
@@ -98,10 +98,10 @@
   }
 
   unless $dns_options == undef {
-    if is_array($dns_options) {
-      $used_options = $dns_options.unique.join(',')
+    $used_options = if $dns_options =~ Array {
+      $dns_options.unique.join(',')
     } else {
-      $used_options = $dns_options
+      $dns_options
     }
 
     $has_options = $facts['networkmanager_dns'][$_connection]['options'].join(',')
diff --git a/manifests/init.pp b/manifests/init.pp
index e6cdea5..80b5420 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -149,14 +149,10 @@
   }
 
   if $enable_global_dns {
-    if $global_dns_options {
-      if is_array($global_dns_options) {
-        $real_dns_options = join($global_dns_options, ',')
-      } else {
-        $real_dns_options = $global_dns_options
-      }
-    } else {
-      $real_dns_options = undef
+    $real_dns_options = $global_dns_options ? {
+      Array   => $global_dns_options.join(','),
+      String  => $global_dns_options,
+      default => undef,
     }
 
     file { $global_conffile:
diff --git a/metadata.json b/metadata.json
index 861b5bf..bcef07f 100644
--- a/metadata.json
+++ b/metadata.json
@@ -6,7 +6,7 @@
   "license": "LGPL-3.0-or-later",
   "source": "https://git.pixelpark.com/puppet/networkmanager.git",
   "dependencies": [
-    { "name": "puppetlabs-stdlib",      "version_requirement": ">=7.0.0 <9.0.0" }
+    { "name": "puppetlabs-stdlib",      "version_requirement": ">= 7.0.0 < 10.0.0" }
   ],
   "operatingsystem_support": [
     {