diff --git a/.fixtures.yml b/.fixtures.yml
index 74fc7da..60ed40e 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -5,13 +5,13 @@ fixtures:
       ref: "3.0.1"
     stdlib:
       repo: "puppetlabs/stdlib"
-      ref: "5.2.0"
+      ref: "9.3.0"
     mysql:
       repo: "puppetlabs/mysql"
-      ref: "10.9.0"
+      ref: "15.0.0"
     postgresql:
       repo: "puppetlabs/postgresql"
-      ref: "6.4.0"
+      ref: "9.1.0"
     concat:
       repo: "puppetlabs/concat"
       ref: "5.3.0"
@@ -26,5 +26,7 @@ fixtures:
       repo: "puppetlabs/augeas_core"
       puppet_version: ">= 6.0.0"
       ref: "1.0.4"
+  repositories:
+    systemd: 'https://github.com/voxpupuli/puppet-systemd'
   symlinks:
     powerdns: "#{source_dir}"
diff --git a/README.md b/README.md
index 8e585b2..9e18bcb 100644
--- a/README.md
+++ b/README.md
@@ -375,6 +375,14 @@ We believe it also on other operating systems such as:
 * Scientific Linux
 * Arch Linux
 
+The packages on EL are a bit stupid. The schemas have the exact PowerDNS version
+hardcoded in the paths. The main class has three parameters where you can adjust
+it:
+
+* `mysql_schema_file`
+* `pgsql_schema_file`
+* `sqlite_schema_file`
+
 ## Development
 
 We strongly believe in the power of open source. This module is our way
diff --git a/manifests/authoritative.pp b/manifests/authoritative.pp
index 69719d4..639aa26 100644
--- a/manifests/authoritative.pp
+++ b/manifests/authoritative.pp
@@ -8,7 +8,7 @@
     ensure => $package_ensure,
   }
 
-  ensure_packages($install_packages)
+  stdlib::ensure_packages($install_packages)
 
   # install the right backend
   case $::powerdns::backend {
diff --git a/manifests/backends/postgresql.pp b/manifests/backends/postgresql.pp
index 9671c8e..14a8fc9 100644
--- a/manifests/backends/postgresql.pp
+++ b/manifests/backends/postgresql.pp
@@ -81,9 +81,13 @@
   }
 
   if $::powerdns::backend_create_tables {
+    $password_hash = $db_password ? {
+      Undef   => undef,
+      default => postgresql_password($::powerdns::db_username, $_db_password),
+    }
     postgresql::server::db { $::powerdns::db_name:
       user     => $::powerdns::db_username,
-      password => postgresql_password($::powerdns::db_username, $_db_password),
+      password => $password_hash,
       require  => Package[$::powerdns::params::pgsql_backend_package_name],
     }
 
diff --git a/manifests/params.pp b/manifests/params.pp
index 5604d56..d856e0b 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -5,6 +5,18 @@
 
   case $facts['os']['family'] {
     'RedHat': {
+      case $facts['os']['release']['major'] {
+        '7': {
+          $mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.1.14/schema.mysql.sql'
+          $pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.1.14/schema.pgsql.sql'
+          $sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.1.14/schema.sqlite.sql'
+        }
+        default: {
+          $mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.8.1/schema.mysql.sql'
+          $pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.8.1/schema.pgsql.sql'
+          $sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.8.1/schema.sqlite.sql'
+        }
+      }
       $authoritative_package = 'pdns'
       $authoritative_service = 'pdns'
       $authoritative_config = '/etc/pdns/pdns.conf'
@@ -14,9 +26,6 @@
       $ldap_backend_package_name = 'pdns-backend-ldap'
       $pgsql_backend_package_name = 'pdns-backend-postgresql'
       $sqlite_backend_package_name = 'pdns-backend-sqlite'
-      $mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.*.*/schema.mysql.sql'
-      $pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.*.*/schema.pgsql.sql'
-      $sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.*.*/schema.sqlite.sql'
       $sqlite_package_name = 'sqlite'
       $authoritative_configdir = '/etc/pdns'
       $recursor_package = 'pdns-recursor'
diff --git a/manifests/repo.pp b/manifests/repo.pp
index 6353eae..1d3653e 100644
--- a/manifests/repo.pp
+++ b/manifests/repo.pp
@@ -15,7 +15,7 @@
       Yumrepo['powerdns-recursor'] -> Package <| title == $::powerdns::params::recursor_package |>
 
       if versioncmp($::operatingsystemmajrelease, '7') <= 0 {
-        ensure_packages('yum-plugin-priorities')
+        stdlib::ensure_packages('yum-plugin-priorities')
 
         Package['yum-plugin-priorities']
         -> Yumrepo['powerdns']
diff --git a/metadata.json b/metadata.json
index e258b3a..6af62bf 100644
--- a/metadata.json
+++ b/metadata.json
@@ -10,15 +10,15 @@
   "dependencies": [
     {
       "name": "puppetlabs/stdlib",
-      "version_requirement": ">=4.3.2 < 9.0.0"
+      "version_requirement": ">= 9.0.0 < 10.0.0"
     },
     {
       "name": "puppetlabs/mysql",
-      "version_requirement": ">=3.4.0 < 15.0.0"
+      "version_requirement": ">= 15.0.0 < 16.0.0"
     },
     {
       "name": "puppetlabs/postgresql",
-      "version_requirement": ">=6.4.0 < 10.0.0"
+      "version_requirement": ">= 9.1.0 < 10.0.0"
     },
     {
       "name": "puppetlabs/apt",
diff --git a/pdk.yaml b/pdk.yaml
new file mode 100644
index 0000000..4bef4bd
--- /dev/null
+++ b/pdk.yaml
@@ -0,0 +1,2 @@
+---
+ignore: []
diff --git a/spec/classes/powerdns_init_spec.rb b/spec/classes/powerdns_init_spec.rb
index 1593f36..bd82453 100644
--- a/spec/classes/powerdns_init_spec.rb
+++ b/spec/classes/powerdns_init_spec.rb
@@ -1,5 +1,6 @@
 override_facts = {
-  root_home: '/root'
+  root_home: '/root',
+  service_provider: 'systemd'
 }
 
 require 'spec_helper'
@@ -11,17 +12,23 @@
           facts.merge(override_facts)
         end
 
-        case facts[:osfamily]
+        case facts[:os]['family']
         when 'RedHat'
           authoritative_package_name = 'pdns'
           authoritative_service_name = 'pdns'
           authoritative_config = '/etc/pdns/pdns.conf'
-          mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.*.*/schema.mysql.sql'
+          if facts[:os]['release']['major'].to_i == 7
+            mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.1.14/schema.mysql.sql'
+            pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.1.14/schema.pgsql.sql'
+            sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.1.14/schema.sqlite.sql'
+          else
+            mysql_schema_file = '/usr/share/doc/pdns-backend-mysql-4.8.1/schema.mysql.sql'
+            pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.8.1/schema.pgsql.sql'
+            sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.8.1/schema.sqlite.sql'
+          end
           pgsql_backend_package_name = 'pdns-backend-postgresql'
-          pgsql_schema_file = '/usr/share/doc/pdns-backend-postgresql-4.*.*/schema.pgsql.sql'
           sqlite_backend_package_name = 'pdns-backend-sqlite'
           sqlite_binary_package_name = 'sqlite'
-          sqlite_schema_file = '/usr/share/doc/pdns-backend-sqlite-4.*.*/schema.sqlite.sql'
           recursor_package_name = 'pdns-recursor'
           recursor_service_name = 'pdns-recursor'
         when 'Debian'