diff --git a/group_vars/all/plain.yml b/group_vars/all/plain.yml
index be34c51..af32dd4 100644
--- a/group_vars/all/plain.yml
+++ b/group_vars/all/plain.yml
@@ -72,6 +72,7 @@ hetzner_ssh_keys:
   - "friedrich.goerz@netgo.de"
   - "peter.heise@netgo.de"
   - "sven.ketelsen@netgo.de"
+  - "michael.haehnel@netgo.de"
   - "{{ awx_ansible_user_name }}@netgo.de"
   - "{{ gitlab_ansible_user_name }}@git.dev-at.de"