diff --git a/defaults/main.yml b/defaults/main.yml
index adbf47f..09690a8 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -28,6 +28,8 @@ nextcloud_server_names:
 
 nextcloud_force_downgrade: false
 
-timezone: UTC
+timezone: Europe/Berlin
+
+nextcloud_postgresql_lc: de_DE.UTF-8
 
 nextcloud_php_version: 7.3
diff --git a/tasks/install.yml b/tasks/install.yml
index fef5b60..e1bb9a1 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -24,8 +24,9 @@
     php occ maintenance:install
     --admin-user "{{ nextcloud_admin_user }}"
     --admin-pass "{{ nextcloud_admin_pass }}"
-    --database "{{ nextcloud_database_type }}"
-    --database-host "{{ (nextcloud_database_host == inventory_hostname) | ternary('localhost',nextcloud_database_host) }}"
+    --database "{{ _nextcloud_database_type_cli[nextcloud_database_type] }}"
+    --database-host "{{ (nextcloud_database_host == inventory_hostname)
+      | ternary(_nextcloud_database_localhost_cli[nextcloud_database_type],nextcloud_database_host) }}"
     --database-name "{{ nextcloud_database_name }}"
     --database-user "{{ nextcloud_database_user }}"
     --database-pass "{{ nextcloud_database_pass }}"
diff --git a/tasks/main.yml b/tasks/main.yml
index b8b50a6..7354a2d 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -22,6 +22,9 @@
 - import_tasks: mysql.yml
   when: nextcloud_database_type == "mysql"
 
+- import_tasks: postgresql.yaml
+  when: nextcloud_database_type == "postgresql"
+
 - import_tasks: core.yml
   when:
     nextcloud_state == "reinstalled" or
diff --git a/tasks/mysql.yml b/tasks/mysql.yml
index 6dce89d..cfde707 100644
--- a/tasks/mysql.yml
+++ b/tasks/mysql.yml
@@ -6,7 +6,7 @@
     host: "{{ (nextcloud_database_host == inventory_hostname) | ternary('localhost',nextcloud_database_host) }}"
     password: "{{ nextcloud_database_pass }}"
     priv: "{{nextcloud_database_name}}.*:ALL"
-  delegate_to: "{{ nextcloud_database_host }}"
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
 
 - name: mysql database
   mysql_db:
@@ -14,4 +14,4 @@
     encoding: utf8mb4
     collation: utf8mb4_unicode_ci
     state: present
-  delegate_to: "{{ nextcloud_database_host }}"
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
diff --git a/tasks/postgresql.yaml b/tasks/postgresql.yaml
new file mode 100644
index 0000000..24d739d
--- /dev/null
+++ b/tasks/postgresql.yaml
@@ -0,0 +1,26 @@
+---
+
+- name: debian packages required for database management
+  apt:
+    pkg: python-psycopg2
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
+
+- name: postgresql database
+  postgresql_db:
+    name: "{{nextcloud_database_name}}"
+    encoding: UTF-8
+    lc_collate: "{{nextcloud_postgresql_lc}}"
+    lc_ctype: "{{nextcloud_postgresql_lc}}"
+    template: template0
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
+  become: yes
+  become_user: postgres
+
+- name: postgresql user
+  postgresql_user:
+    name: "{{ nextcloud_database_user }}"
+    password: "{{ nextcloud_database_pass }}"
+    db: "{{nextcloud_database_name}}"
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
+  become: yes
+  become_user: postgres
diff --git a/tasks/reset.yml b/tasks/reset.yml
index 381131e..0cf86f9 100644
--- a/tasks/reset.yml
+++ b/tasks/reset.yml
@@ -10,13 +10,27 @@
     path: "{{nextcloud_directory}}"
     state: absent
 
+- name: delete nextcloud lib directory
+  file:
+    path: "{{nextcloud_lib_directory}}"
+    state: absent
+
 - name: drop mysql database
   mysql_db:
     name: "{{nextcloud_database_name}}"
     state: absent
-  delegate_to: "{{ nextcloud_database_host }}"
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
   when: nextcloud_database_type == "mysql"
 
+- name: drop postgresql database
+  postgresql_db:
+    name: "{{nextcloud_database_name}}"
+    state: absent
+  delegate_to: "{{ (nextcloud_database_host != 'localhost') | ternary(nextcloud_database_host,inventory_hostname) }}"
+  when: nextcloud_database_type == "postgresql"
+  become: yes
+  become_user: postgres
+
 - name: delete nextcloud log
   file:
     path: /var/log/nextcloud/nextcloud.log
diff --git a/tasks/setup_Debian.yml b/tasks/setup_Debian.yml
index ea294cb..8298016 100644
--- a/tasks/setup_Debian.yml
+++ b/tasks/setup_Debian.yml
@@ -19,6 +19,7 @@
       - php{{nextcloud_php_version}}-mbstring
       - php{{nextcloud_php_version}}-zip
       - php{{nextcloud_php_version}}-mysql
+      - php{{nextcloud_php_version}}-pgsql
       - php{{nextcloud_php_version}}-curl
       - php{{nextcloud_php_version}}-intl
       - php{{nextcloud_php_version}}-imagick
@@ -29,4 +30,5 @@
       - php{{nextcloud_php_version}}-memcached
       - libreoffice
       - mariadb-client
+      - rsync
   notify: restart apache2
diff --git a/vars/main.yml b/vars/main.yml
index b85149e..468c145 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -11,3 +11,11 @@ _nextcloud_valid_states:
   - reinstalled
   - installed
   - updated
+
+_nextcloud_database_type_cli:
+  mysql: mysql
+  postgresql: pgsql
+
+_nextcloud_database_localhost_cli:
+  mysql: localhost
+  postgresql: /var/run/postgresql