diff --git a/roles/postgresql/README.md b/roles/postgresql/README.md
index aa6f4032..35bdc2f7 100644
--- a/roles/postgresql/README.md
+++ b/roles/postgresql/README.md
@@ -14,10 +14,11 @@ There are also several **required** variables you will need to set before using
 
 ### Variables required by both the server and client
 
-| Name                          | Description                                                         |
-| ----------------------------- | ------------------------------------------------------------------- |
-| `postgresql_rpm_gpg_key_pgdg` | URL from which to download the RPM GPP key; not needed for CentOS 7 |
-| `postgresql_use_ssl`          | Whether to use SSL                                                  |
+| Name                                 | Description                                                                         |
+| ------------------------------------ | ----------------------------------------------------------------------------------- |
+| `postgresql_rpm_gpg_key_pgdg_x86_64` | URL from which to download the RPM GPP key for Intel chips; not needed for CentOS 7 |
+| `postgresql_rpm_gpg_key_pgdg_x86_64` | URL from which to download the RPM GPP key for ARM chips; not needed for CentOS 7   |
+| `postgresql_use_ssl`                 | Whether to use SSL                                                                  |
 
 ### Required variables for the PostgreSQL server
 
@@ -71,7 +72,7 @@ To use this role with a dual-server setup (a dartase `db` and a web server `web`
         - name: Import postgresql rpm key
           ansible.builtin.rpm_key:
             state: present
-            key: "{{ postgresql_rpm_gpg_key_pgdg }}"
+            key: "{{ postgresql_rpm_gpg_key_pgdg_x86_64 }}"
 
 - name: Create client SSL certificate
   hosts: web
diff --git a/roles/provision/README.md b/roles/provision/README.md
index 9547093f..8038fd31 100644
--- a/roles/provision/README.md
+++ b/roles/provision/README.md
@@ -8,7 +8,9 @@ If you would like to run Ansible Molecule to test this role, the requirements ar
 
 ## Role Variables
 
-`postgresql_rpm_gpg_key_pgdg`: the postgresql key. This is not needed for CentOS 7.
+`postgresql_rpm_gpg_key_pgdg_x86_64`: the postgresql key for Intel chips.
+`postgresql_rpm_gpg_key_pgdg_x86_64`: the postgresql key for ARM chips. These
+are not needed for CentOS 7.
 
 `server_locale`: the sets the user's language, region, etc. This is set to "en_GB.UTF-8"
 
diff --git a/roles/provision/defaults/main.yml b/roles/provision/defaults/main.yml
index d7f996c7..6a443be6 100644
--- a/roles/provision/defaults/main.yml
+++ b/roles/provision/defaults/main.yml
@@ -1,3 +1,8 @@
 ---
-postgresql_rpm_gpg_key_pgdg: "https://www.postgresql.org/download/keys/RPM-GPG-KEY-PGDG" # not needed for CentOS 7
+# not needed for CentOS 7
+postgresql_rpm_gpg_key_pgdg_x86_64: >-
+  https://apt.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-RHEL
+# not needed for CentOS 7
+postgresql_rpm_gpg_key_pgdg_aarch64: >-
+  https://apt.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
 server_locale: "en_GB.UTF-8"
diff --git a/roles/provision/tasks/Rocky.yml b/roles/provision/tasks/Rocky.yml
index 3075b17e..dd669f7e 100644
--- a/roles/provision/tasks/Rocky.yml
+++ b/roles/provision/tasks/Rocky.yml
@@ -14,7 +14,9 @@
 - name: Import postgresql rpm key
   ansible.builtin.rpm_key:
     state: present
-    key: "{{ postgresql_rpm_gpg_key_pgdg }}"
+    key: >-
+      {{ lookup('vars',
+      'postgresql_rpm_gpg_key_pgdg_' + ansible_architecture) }}
 
 - name: Check if locale already set
   ansible.builtin.shell: |
diff --git a/tests/molecule/resources/roles/inventory/group_vars/all.yml b/tests/molecule/resources/roles/inventory/group_vars/all.yml
index 360b33f7..d4f4f525 100644
--- a/tests/molecule/resources/roles/inventory/group_vars/all.yml
+++ b/tests/molecule/resources/roles/inventory/group_vars/all.yml
@@ -48,7 +48,8 @@ firewalld_internal_zone_ports:
   - "5432"
 
 # mirsg.infrastructure.postgresql
-postgresql_rpm_gpg_key_pgdg: "https://www.postgresql.org/download/keys/RPM-GPG-KEY-PGDG"
+postgresql_rpm_gpg_key_pgdg_x86_64: >-
+  https://apt.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-RHEL
 postgresql_use_ssl: false
 postgresql_database:
   database_name: "database"