diff --git a/roles/php_website/defaults/main.yml b/roles/php_website/defaults/main.yml
index c56f66bbd2a58b040e14b478218e854c0de4faa2..06cdc595f15e05d252c5ffa7ac857a14592ddce9 100644
--- a/roles/php_website/defaults/main.yml
+++ b/roles/php_website/defaults/main.yml
@@ -12,9 +12,21 @@ website_mail_recipients: "root"
 environment_indicator: null
 
 # Internal parameters.
+php_fpm_service_name_per_release:
+  stretch: "php7.0-fpm"
+  buster: "php7.3-fpm"
+
+php_fpm_binary_per_release:
+  stretch: "php-fpm7.0"
+  buster: "php-fpm7.3"
+
+php_fpm_pool_directory_per_release:
+  stretch: "/etc/php/7.0/fpm/pool.d"
+  buster: "/etc/php/7.3/fpm/pool.d"
+
 admin: "admin-{{ fqdn | replace('.', '_') }}"
 user: "web-{{ fqdn | replace('.', '_') }}"
 home: "/var/www/{{ fqdn }}"
-php_fpm_pool_directory: "/etc/php/7.0/fpm/pool.d"
-php_fpm_binary: "php-fpm7.0"
-php_fpm_service_name: "php7.0-fpm"
+php_fpm_pool_directory: "{{ php_fpm_pool_directory_per_release[ansible_distribution_release] }}"
+php_fpm_binary: "{{ php_fpm_binary_per_release[ansible_distribution_release] }}"
+php_fpm_service_name: "{{ php_fpm_service_name_per_release[ansible_distribution_release] }}"