diff --git a/etc/kayobe/ansible.cfg b/etc/kayobe/ansible.cfg
index 515af8d32..901001ad8 100644
--- a/etc/kayobe/ansible.cfg
+++ b/etc/kayobe/ansible.cfg
@@ -8,6 +8,8 @@ bin_ansible_callbacks = True
 inject_facts_as_vars = False
 # Add timing information to output
 callbacks_enabled = ansible.posix.profile_tasks
+# Silence warning about invalid characters found in group names
+force_valid_group_names = ignore
 
 [ssh_connection]
 pipelining = True