diff --git a/README.md b/README.md
index 4416192..bb480f3 100644
--- a/README.md
+++ b/README.md
@@ -74,14 +74,21 @@ backend_override: {}
 # days of validity left on a certificate bevore it is renewed
 remainingdays: 28
 
-# challange type to use, can be:
-# 'dns-01': use the dns challange and a custom power dns backend
-# 'dns-01-manual': use the dns challange and manualy set the dns record
-# 'http-01: use the http challange and deploy the challanges to a webserver
-challange: dns-01
+# challenge type to use, can be:
+# 'dns-01': use the dns challenge and a custom powerdns backend
+# 'dns-01-manual': use the dns challenge and manualy set the dns record
+# 'http-01: use the http challenge and deploy the challenges to a webserver
+challenge: dns-01
 
-# servers to deploy a challange to
-challangeserver: []
+# servers to deploy a challenge to
+challengeserver: []
+
+# Automaticly renew certificates using a cronjob
+# Only supports the following cases:
+# * 'dns-01' challenge with the custom powerdns backend
+# This setting musst be set the first time the certificate is requested, it can not be enabled later without first deleting the certificates.
+# Requires a working mail setup with some sort of sendmail binary to send warnings if a certificate can not be renewed.
+autorenew: False
 ```
 
 #### Selfsigned
diff --git a/defaults/main.yml b/defaults/main.yml
index afe31d8..1d39e8f 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -2,8 +2,9 @@ certificates:
   backends:
     letsencrypt:
       remainingdays: 28
-      challange: dns-01
-      challangeserver: []
+      challenge: dns-01
+      challengeserver: []
+      autorenew: False
     selfsigned:
       not_after: "+3650d"
     ownca:
diff --git a/files/letsencrypt_deploy_challenge.sh b/files/letsencrypt_deploy_challenge.sh
new file mode 100755
index 0000000..4280872
--- /dev/null
+++ b/files/letsencrypt_deploy_challenge.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+for i in $LETSENCRYPT_CHALLENGE_SERVERS; do
+	ssh -i /etc/letsencrypt/renewkey -o "StrictHostKeyChecking no" letsencrypt@$i $(< $LETSENCRYPT_TOKEN ) $1 $2
+done
diff --git a/files/letsencrypt_renew.sh b/files/letsencrypt_renew.sh
new file mode 100755
index 0000000..25c53e0
--- /dev/null
+++ b/files/letsencrypt_renew.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+set -euo pipefail
+
+source $1
+
+daysleft=$(/usr/local/bin/acme-primitives.py remaining_days "$LETSENCRYPT_CRT" || echo "0") 2>/dev/null
+[ "$daysleft" -lt "$LETSENCRYPT_REMAININGDAYS" ] || exit 0
+
+folder="$(mktemp -d)"
+cd "$folder"
+/usr/local/bin/acme-primitives.py get_cert --directory 'https://acme-v02.api.letsencrypt.org/directory' --acc /etc/ssl/letsencrypt_account.key --csr $LETSENCRYPT_CSR /usr/local/bin/letsencrypt_deploy_challenge.sh > chained.pem
+
+cat chained.pem "$LETSENCRYPT_KEY" > full.pem
+openssl x509 -in chained.pem > cert.pem
+
+chown -R root:ssl-cert .
+chmod 0644 chained.pem
+chmod 0644 cert.pem
+chmod 0640 full.pem
+
+mv chained.pem "$LETSENCRYPT_CHAIN"
+mv cert.pem "$LETSENCRYPT_CRT"
+mv full.pem "$LETSENCRYPT_FULL"
+
+cd
+rm -r "$folder"
+
+for i in $LETSENCRYPT_SERVICES; do
+	/bin/systemctl "$i" restart
+done
diff --git a/tasks/letsencrypt_cert.yml b/tasks/letsencrypt_cert.yml
index 5a4bee7..f44fe73 100644
--- a/tasks/letsencrypt_cert.yml
+++ b/tasks/letsencrypt_cert.yml
@@ -1,9 +1,9 @@
 - include_tasks: common_cert.yml
 
 - set_fact:
-    external_challange_type: "{{ map_challange_type_letsencrypt[cert_backend.challange]|d(cert_backend.challange) }}"
+    external_challenge_type: "{{ map_challenge_type_letsencrypt[cert_backend.challenge]|d(cert_backend.challenge) }}"
 
-- name: "get challange for {{ certname }}"
+- name: "get challenge for {{ certname }}"
   acme_certificate: &acmetask
     force: "{{ task_generate_csr is changed }}"
     acme_version: 2
@@ -14,43 +14,94 @@
     dest: "{{ cert.certpath }}"
     fullchain_dest: "{{ cert.chainpath }}"
     remaining_days: "{{ cert_backend.remainingdays }}"
-    challenge: "{{ external_challange_type }}"
+    challenge: "{{ external_challenge_type }}"
     deactivate_authzs: yes
   register: challenge
 
-- name: "setup challenge server for {{ certname }} (dns challange)"
+- name: "setup autorenew for {{ certname }} (dns challenge)"
+  when:
+  - cert_backend.autorenew
+  - cert_backend.challenge == "dns-01"
+  block:
+  - name: create token
+    copy:
+      dest: "/etc/letsencrypt/cert_{{ certname }}.token"
+      mode: 0640
+      owner: root
+      group: root
+      content: "{{ lookup('password', '/dev/null length=128 chars=ascii_letters,digits,hexdigits') }}"
+      force: no
+  - name: slurp up token
+    slurp:
+      src: "/etc/letsencrypt/cert_{{ certname }}.token"
+    register: tokenfile
+  - name: add renew ssh key to backend server
+    delegate_to: "{{ item }}"
+    loop: "{{ cert_backend.challengeserver }}"
+    authorized_key:
+      user: letsencrypt
+      key: "{{ letsencrypt_renewkey.public_key }}"
+  - name: add server token to record whitelist on backend server
+    when:
+    - challenge is changed
+    delegate_to: "{{ item.0 }}"
+    loop: "{{ cert_backend.challengeserver|product(challenge.challenge_data.keys()|list)|list }}"
+    command:
+      argv:
+      - "/usr/local/bin/pdns.py"
+      - "add_token"
+      - "--"
+      - "{{ tokenfile.content | b64decode }}"
+      - "{{ challenge.challenge_data[item.1]['dns-01'].record }}"
+  - name: create cert renew config
+    template:
+      src: letsencrypt_renew_config.j2
+      dest: "/etc/letsencrypt/renew_{{ certname }}.config.sh"
+      mode: 0750
+      owner: root
+      group: root
+  - name: setup renew cronjob
+    cron:
+      job: "/usr/local/bin/letsencrypt_renew.sh /etc/letsencrypt/renew_{{ certname }}.config.sh"
+      name: "letsencrypt: renew {{ certname }}"
+      hour: "{{ 23 | random(seed=inventory_hostname + certname + 'renew') }}"
+      minute: "{{ 59 | random(seed=inventory_hostname + certname + 'renew') }}"
+
+- name: "setup challenge server for {{ certname }} (dns challenge)"
   when:
   - challenge is changed
-  - cert_backend.challange == "dns-01"
+  - cert_backend.challenge == "dns-01"
   delegate_to: "{{ item.0 }}"
-  loop: "{{ cert_backend.challangeserver|product(challenge.challenge_data.keys()|list)|list }}"
+  loop: "{{ cert_backend.challengeserver|product(challenge.challenge_data.keys()|list)|list }}"
   command:
     argv:
     - "/usr/local/bin/pdns.py"
+    - "add_challenge"
+    - "--"
     - "{{ challenge.challenge_data[item.1]['dns-01'].record }}"
     - "{{ challenge.challenge_data[item.1]['dns-01'].resource_value }}"
 
-- name: "setup challenge server for {{ certname }} (manual dns challange)"
+- name: "setup challenge server for {{ certname }} (manual dns challenge)"
   when:
   - challenge is changed
-  - cert_backend.challange == "dns-01-manual"
+  - cert_backend.challenge == "dns-01-manual"
   loop: "{{ challenge.challenge_data_dns|d({})|dict2items }}"
   debug:
     msg: "add the following dns record: '{{ item.key }}.': { TXT: {{ item.value }} }"
 
-- name: wait for challenges in dns (manual dns challange)
+- name: wait for challenges in dns (manual dns challenge)
   pause:
     prompt: "When the relevant lines were added to dns and synced, press enter"
   when:
   - challenge is changed
-  - cert_backend.challange == "dns-01-manual"
+  - cert_backend.challenge == "dns-01-manual"
 
-- name: "setup challenge server for {{ certname }} (http challange)"
+- name: "setup challenge server for {{ certname }} (http challenge)"
   when:
   - challenge is changed
-  - cert_backend.challange == "http-01"
+  - cert_backend.challenge == "http-01"
   delegate_to: "{{ item.0 }}"
-  loop: "{{ cert_backend.challangeserver|product(challenge.challenge_data.keys()|list)|list }}"
+  loop: "{{ cert_backend.challengeserver|product(challenge.challenge_data.keys()|list)|list }}"
   copy:
     dest: "/var/www/letsencrypt/{{ challenge.challenge_data[item.1]['http-01'].resource | basename }}"
     content: "{{ challenge.challenge_data[item.1]['http-01'].resource_value }}"
diff --git a/tasks/letsencrypt_setup.yml b/tasks/letsencrypt_setup.yml
index f2e6833..d9a76fb 100644
--- a/tasks/letsencrypt_setup.yml
+++ b/tasks/letsencrypt_setup.yml
@@ -5,3 +5,52 @@
     owner: root
     group: root
     mode: 0600
+
+- name: register letsencrypt account
+  acme_account:
+    account_key_src: /etc/ssl/letsencrypt_account.key
+    state: present
+    terms_agreed: yes
+    acme_version: 2
+    acme_directory: "https://acme-v02.api.letsencrypt.org/directory"
+
+- name: ensure config folders exist
+  file:
+    path: /etc/letsencrypt/
+    state: directory
+    owner: root
+    group: root
+    mode: 0755
+
+- name: generate letsencrypt auto renew ssh key
+  register: letsencrypt_renewkey
+  openssh_keypair:
+    owner: root
+    group: root
+    path: /etc/letsencrypt/renewkey
+    type: ed25519
+    comment: "letsencrypt-renew@{{ inventory_hostname }}"
+
+- name: copy challenge deployment script
+  copy:
+    src: letsencrypt_deploy_challenge.sh
+    dest: /usr/local/bin/letsencrypt_deploy_challenge.sh
+    owner: root
+    group: root
+    mode: 0755
+
+- name: copy letsencrypt renew skript
+  copy:
+    src: letsencrypt_renew.sh
+    dest: /usr/local/bin/letsencrypt_renew.sh
+    owner: root
+    group: root
+    mode: 0755
+
+- name: copy acme primitives
+  get_url:
+    dest: /usr/local/bin/acme-primitives.py
+    owner: root
+    group: root
+    mode: 0755
+    url: "https://git.notandy.de/ansible/acme-primitives/-/raw/master/acme-primitives.py"
diff --git a/tasks/main.yml b/tasks/main.yml
index 3b7bec6..607033d 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -3,6 +3,8 @@
     pkg:
       - openssl
       - python3-cryptography
+      - python3-acme
+      - python3-click
 
 - name: add group ssl-cert
   group:
diff --git a/templates/letsencrypt_renew_config.j2 b/templates/letsencrypt_renew_config.j2
new file mode 100644
index 0000000..07ac7ba
--- /dev/null
+++ b/templates/letsencrypt_renew_config.j2
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+export LETSENCRYPT_CHALLENGE_SERVERS="{{ cert_backend.challengeserver|join(' ') }}"
+export LETSENCRYPT_CSR="{{ cert.csrpath }}"
+export LETSENCRYPT_CRT="{{ cert.certpath }}"
+export LETSENCRYPT_KEY="{{ cert.keypath }}"
+export LETSENCRYPT_CHAIN="{{ cert.chainpath }}"
+export LETSENCRYPT_FULL="{{ cert.fullpath }}"
+export LETSENCRYPT_TOKEN="/etc/letsencrypt/cert_{{ certname }}.token"
+export LETSENCRYPT_SERVICES="{{ cert.depending_services }}"
+export LETSENCRYPT_REMAININGDAYS="{{ cert_backend.remainingdays }}"
diff --git a/vars/main.yml b/vars/main.yml
index 168ac56..8d4f1a1 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -1,3 +1,3 @@
-map_challange_type_letsencrypt:
+map_challenge_type_letsencrypt:
   'dns-01-manual': 'dns-01'