diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 9178314ee..2ace75d19 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -53,6 +53,8 @@ matrix_homeserver_container_extra_arguments_auto: |
     +
     (['--mount type=bind,src=' + matrix_mautrix_discord_config_path + '/registration.yaml,dst=/matrix-mautrix-discord-registration.yaml,ro'] if matrix_mautrix_discord_enabled else [])
     +
+    (['--mount type=bind,src=' + matrix_mautrix_slack_config_path + '/registration.yaml,dst=/matrix-mautrix-slack-registration.yaml,ro'] if matrix_mautrix_slack_enabled else [])
+    +
     (['--mount type=bind,src=' + matrix_mautrix_facebook_config_path + '/registration.yaml,dst=/matrix-mautrix-facebook-registration.yaml,ro'] if matrix_mautrix_facebook_enabled else [])
     +
     (['--mount type=bind,src=' + matrix_mautrix_googlechat_config_path + '/registration.yaml,dst=/matrix-mautrix-googlechat-registration.yaml,ro'] if matrix_mautrix_googlechat_enabled else [])
@@ -108,6 +110,8 @@ matrix_homeserver_app_service_config_files_auto: |
     +
     (['/matrix-mautrix-discord-registration.yaml'] if matrix_mautrix_discord_enabled else [])
     +
+    (['/matrix-mautrix-slack-registration.yaml'] if matrix_mautrix_slack_enabled else [])
+    +
     (['/matrix-mautrix-facebook-registration.yaml'] if matrix_mautrix_facebook_enabled else [])
     +
     (['/matrix-mautrix-googlechat-registration.yaml'] if matrix_mautrix_googlechat_enabled else [])
@@ -209,6 +213,8 @@ devture_systemd_service_manager_services_list_auto: |
     +
     ([{'name': 'matrix-mautrix-discord.service', 'priority': 2000, 'groups': ['matrix', 'bridges', 'mautrix-discord']}] if matrix_mautrix_discord_enabled else [])
     +
+    ([{'name': 'matrix-mautrix-slack.service', 'priority': 2000, 'groups': ['matrix', 'bridges', 'mautrix-slack']}] if matrix_mautrix_slack_enabled else [])
+    +
     ([{'name': 'matrix-mautrix-facebook.service', 'priority': 2000, 'groups': ['matrix', 'bridges', 'mautrix-facebook']}] if matrix_mautrix_facebook_enabled else [])
     +
     ([{'name': 'matrix-mautrix-googlechat.service', 'priority': 2000, 'groups': ['matrix', 'bridges', 'mautrix-googlechat']}] if matrix_mautrix_googlechat_enabled else [])
@@ -725,6 +731,46 @@ matrix_mautrix_discord_database_password: "{{ '%s' | format(matrix_homeserver_ge
 ######################################################################
 
 
+######################################################################
+#
+# matrix-bridge-mautrix-slack
+#
+######################################################################
+
+# We don't enable bridges by default.
+matrix_mautrix_slack_enabled: false
+
+matrix_mautrix_slack_container_image_self_build: "{{ matrix_architecture not in ['arm64', 'amd64'] }}"
+
+matrix_mautrix_slack_systemd_required_services_list: |
+  {{
+    ['docker.service']
+    +
+    ['matrix-' + matrix_homeserver_implementation + '.service']
+    +
+    ([devture_postgres_identifier ~ '.service'] if devture_postgres_enabled else [])
+    +
+    (['matrix-nginx-proxy.service'] if matrix_nginx_proxy_enabled else [])
+  }}
+
+matrix_mautrix_slack_appservice_token: "{{ '%s' | format(matrix_homeserver_generic_secret_key) | password_hash('sha512', 'mauslack.as.tok', rounds=655555) | to_uuid }}"
+
+matrix_mautrix_slack_homeserver_token: "{{ '%s' | format(matrix_homeserver_generic_secret_key) | password_hash('sha512', 'mauslack.hs.tok', rounds=655555) | to_uuid }}"
+
+matrix_mautrix_slack_login_shared_secret: "{{ matrix_synapse_ext_password_provider_shared_secret_auth_shared_secret if matrix_synapse_ext_password_provider_shared_secret_auth_enabled else '' }}"
+
+# Postgres is the default, except if not using internal Postgres server
+matrix_mautrix_slack_database_engine: "{{ 'postgres' if devture_postgres_enabled else 'sqlite' }}"
+matrix_mautrix_slack_database_hostname: "{{ devture_postgres_connection_hostname if devture_postgres_enabled else '' }}"
+matrix_mautrix_slack_database_password: "{{ '%s' | format(matrix_homeserver_generic_secret_key) | password_hash('sha512', 'mauslack.db', rounds=655555) | to_uuid }}"
+
+######################################################################
+#
+# /matrix-bridge-mautrix-slack
+#
+######################################################################
+
+
 ######################################################################
 #
 # matrix-bridge-mautrix-facebook
@@ -2448,7 +2494,7 @@ devture_postgres_managed_databases_auto: |
       'name': matrix_mautrix_slack_database_name,
       'username': matrix_mautrix_slack_database_username,
       'password': matrix_mautrix_slack_database_password,
-    }] if (matrix_mautrix_slack_enabled and matrix_mautrix_slack_database_engine == 'postgres' and matrix_mautrix_slack_database_hostname == 'matrix-postgres') else [])
+    }] if (matrix_mautrix_slack_enabled and matrix_mautrix_slack_database_engine == 'postgres' and matrix_mautrix_slack_database_hostname == devture_postgres_connection_hostname) else [])
     +
     ([{
       'name': matrix_mx_puppet_slack_database_name,
diff --git a/roles/custom/matrix-bridge-mautrix-slack/tasks/init.yml b/roles/custom/matrix-bridge-mautrix-slack/tasks/init.yml
deleted file mode 100644
index 0ea03f5b2..000000000
--- a/roles/custom/matrix-bridge-mautrix-slack/tasks/init.yml
+++ /dev/null
@@ -1,21 +0,0 @@
----
-- ansible.builtin.set_fact:
-    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-mautrix-slack.service'] }}"
-  when: matrix_mautrix_slack_enabled | bool
-
-# If the matrix-synapse role is not used, these variables may not exist.
-- ansible.builtin.set_fact:
-    matrix_homeserver_container_runtime_injected_arguments: >
-      {{
-        matrix_homeserver_container_runtime_injected_arguments | default([])
-        +
-        ["--mount type=bind,src={{ matrix_mautrix_slack_config_path }}/registration.yaml,dst=/matrix-mautrix-slack-registration.yaml,ro"]
-      }}
-
-    matrix_homeserver_app_service_runtime_injected_config_files: >
-      {{
-        matrix_homeserver_app_service_runtime_injected_config_files | default([])
-        +
-        ["/matrix-mautrix-slack-registration.yaml"]
-      }}
-  when: matrix_mautrix_slack_enabled | bool
diff --git a/roles/custom/matrix-bridge-mautrix-slack/tasks/main.yml b/roles/custom/matrix-bridge-mautrix-slack/tasks/main.yml
index d7fc02023..bff905495 100644
--- a/roles/custom/matrix-bridge-mautrix-slack/tasks/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-slack/tasks/main.yml
@@ -1,22 +1,20 @@
 ---
-- ansible.builtin.import_tasks: "{{ role_path }}/tasks/init.yml"
-  tags:
-    - always
 
-- ansible.builtin.import_tasks: "{{ role_path }}/tasks/validate_config.yml"
-  when: "run_setup | bool and matrix_mautrix_slack_enabled | bool"
+- block:
+    - when: matrix_mautrix_slack_enabled | bool
+      ansible.builtin.include_tasks: "{{ role_path }}/tasks/validate_config.yml"
+
+    - when: matrix_mautrix_slack_enabled | bool
+      ansible.builtin.include_tasks: "{{ role_path }}/tasks/setup_install.yml"
   tags:
     - setup-all
     - setup-mautrix-slack
+    - install-all
+    - install-mautrix-slack
 
-- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_install.yml"
-  when: "run_setup and matrix_mautrix_slack_enabled"
-  tags:
-    - setup-all
-    - setup-mautrix-slack
-
-- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
-  when: "run_setup and not matrix_mautrix_slack_enabled"
+- block:
+    - when: not matrix_mautrix_slack_enabled | bool
+      ansible.builtin.include_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
   tags:
     - setup-all
     - setup-mautrix-slack
diff --git a/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_install.yml b/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_install.yml
index c9406f149..f266f0262 100644
--- a/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_install.yml
+++ b/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_install.yml
@@ -1,13 +1,5 @@
 ---
 
-# If the matrix-synapse role is not used, `matrix_synapse_role_executed` won't exist.
-# We don't want to fail in such cases.
-- name: Fail if matrix-synapse role already executed
-  ansible.builtin.fail:
-    msg: >-
-      The matrix-bridge-mautrix-slack role needs to execute before the matrix-synapse role.
-  when: "matrix_synapse_role_executed | default(False)"
-
 - ansible.builtin.set_fact:
     matrix_mautrix_slack_requires_restart: false
 
@@ -20,8 +12,11 @@
 
     - when: "matrix_mautrix_slack_sqlite_database_path_local_stat_result.stat.exists | bool"
       block:
-        - ansible.builtin.set_fact:
-            matrix_postgres_db_migration_request:
+        - ansible.builtin.include_role:
+            name: galaxy/com.devture.ansible.role.postgres
+            tasks_from: migrate_db_to_postgres
+          vars:
+            devture_postgres_db_migration_request:
               src: "{{ matrix_mautrix_slack_sqlite_database_path_local }}"
               dst: "{{ matrix_mautrix_slack_database_connection_string }}"
               caller: "{{ role_path | basename }}"
@@ -30,10 +25,6 @@
               systemd_services_to_stop: ['matrix-mautrix-slack.service']
               pgloader_options: ['--with "quote identifiers"']
 
-        - ansible.builtin.import_role:
-            name: custom/matrix-postgres
-            tasks_from: migrate_db_to_postgres
-
         - ansible.builtin.set_fact:
             matrix_mautrix_slack_requires_restart: true
 
@@ -109,13 +100,9 @@
     mode: 0644
   register: matrix_mautrix_slack_systemd_service_result
 
-- name: Ensure systemd reloaded after matrix-mautrix-slack.service installation
-  ansible.builtin.service:
-    daemon_reload: true
-  when: "matrix_mautrix_slack_systemd_service_result.changed"
-
 - name: Ensure matrix-mautrix-slack.service restarted, if necessary
   ansible.builtin.service:
     name: "matrix-mautrix-slack.service"
     state: restarted
+    daemon_reload: true
   when: "matrix_mautrix_slack_requires_restart | bool"
diff --git a/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_uninstall.yml b/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_uninstall.yml
index 671fa529a..19350b443 100644
--- a/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_uninstall.yml
+++ b/roles/custom/matrix-bridge-mautrix-slack/tasks/setup_uninstall.yml
@@ -5,21 +5,16 @@
     path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-mautrix-slack.service"
   register: matrix_mautrix_slack_service_stat
 
-- name: Ensure matrix-mautrix-slack is stopped
-  ansible.builtin.service:
-    name: matrix-mautrix-slack
-    state: stopped
-    enabled: false
-    daemon_reload: true
-  when: "matrix_mautrix_slack_service_stat.stat.exists"
+- when: matrix_mautrix_slack_service_stat.stat.exists | bool
+  block:
+    - name: Ensure matrix-mautrix-slack is stopped
+      ansible.builtin.service:
+        name: matrix-mautrix-slack
+        state: stopped
+        enabled: false
+        daemon_reload: true
 
-- name: Ensure matrix-mautrix-slack.service doesn't exist
-  ansible.builtin.file:
-    path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-mautrix-slack.service"
-    state: absent
-  when: "matrix_mautrix_slack_service_stat.stat.exists"
-
-- name: Ensure systemd reloaded after matrix-mautrix-slack.service removal
-  ansible.builtin.service:
-    daemon_reload: true
-  when: "matrix_mautrix_slack_service_stat.stat.exists"
+    - name: Ensure matrix-mautrix-slack.service doesn't exist
+      ansible.builtin.file:
+        path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-mautrix-slack.service"
+        state: absent