diff --git a/tasks/main.yml b/tasks/main.yml
index d1cdd59..2996524 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -11,3 +11,6 @@
 
 - name: rspamd dkim signing
   include_tasks: dkim.yml
+
+- name: redis backend
+  include_tasks: redis.yml
diff --git a/tasks/redis.yml b/tasks/redis.yml
new file mode 100644
index 0000000..35c72a2
--- /dev/null
+++ b/tasks/redis.yml
@@ -0,0 +1,6 @@
+---
+- name: install redis backend
+  become: true
+  apt:
+    name: redis
+    state: present
diff --git a/vars/main.yml b/vars/main.yml
index 866c29f..f1357fb 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -1,6 +1,6 @@
 ---
 # versionscheck
-playbook_version_number: 7   # should be a integer
+playbook_version_number: 8   # should be a integer
 playbook_version_path: 'do1jlr.rspamd.version'
 
 # https://github.com/ansible/ansible/issues/36129