diff --git a/defaults/main.yaml b/defaults/main.yaml
index 3b0075f..5f0f9d8 100644
--- a/defaults/main.yaml
+++ b/defaults/main.yaml
@@ -10,7 +10,7 @@ patroni_cluster_name: "patroni-cluster"
 patroni_namespace: "/service/"
 
 # Patroni PostgreSQL common options
-patroni_postgresql_version: "16.3"
+patroni_postgresql_version: "16.4"
 patroni_postgresql_install_repo: true
 patroni_postgresql_system_locale: "en_US.UTF-8"
 patroni_postgresql_system_language: "{{ patroni_postgresql_system_locale }}"
diff --git a/tasks/config.yaml b/tasks/config.yaml
index 28601a5..421088a 100644
--- a/tasks/config.yaml
+++ b/tasks/config.yaml
@@ -44,6 +44,7 @@
     owner: "postgres"
     group: "postgres"
     mode: 0644
+    backup: yes
   register: patroni_config_file
   when: not patroni_config_file_exists_result.stat.exists
   notify: Restart Patroni
@@ -55,3 +56,4 @@
     owner: "postgres"
     group: "postgres"
     mode: 0755
+    backup: yes
diff --git a/tasks/dynamic_config.yaml b/tasks/dynamic_config.yaml
index ac8fcf5..fdf7575 100644
--- a/tasks/dynamic_config.yaml
+++ b/tasks/dynamic_config.yaml
@@ -10,6 +10,7 @@
     owner: "postgres"
     group: "postgres"
     mode: 0644
+    backup: yes
   register: patroni_dynamic_config_file
 
 - name: Dynamic configuration parameters for Patroni
@@ -51,6 +52,7 @@
         password: "{{ patroni_restapi_password }}"
         method: PATCH
         body: "{{ patroni_postgresql_combined_dynamic_parameters | to_nice_json }}"
+        body_format: json
         force_basic_auth: yes
       when:
         - "hostvars[inventory_hostname]['role'] == 'master'"
diff --git a/tasks/restart_pending.yaml b/tasks/restart_pending.yaml
index 0dfbc80..4cfcd59 100644
--- a/tasks/restart_pending.yaml
+++ b/tasks/restart_pending.yaml
@@ -38,6 +38,7 @@
         password: "{{ patroni_restapi_password }}"
         method: POST
         body: '{ "restart_pending": true }'
+        body_format: json
         force_basic_auth: yes
         status_code:
           - 200