diff --git a/roles/common/defaults/main.yml b/roles/common/defaults/main.yml
index a901b5bd0e2bcf837c916204ca9d3ff6be03055b..4e06b099918a64640150f0479bf1454644cf1e96 100644
--- a/roles/common/defaults/main.yml
+++ b/roles/common/defaults/main.yml
@@ -27,7 +27,7 @@ pip_check_requirements_py3:
   - six==1.15.0
   - wheel==0.35.1
 ntp_servers: []
-maintenance: False
+maintenance: false
 maintenance_allowed_hosts: []
 
 # Internal use only.
diff --git a/roles/common/molecule/default/group_vars/parameters-optional.yml b/roles/common/molecule/default/group_vars/parameters-optional.yml
index 18e707e1dc959e4b518737dc83ca294e0182b90e..eb960343d8101ae6a4b4b23c617c33628fe52687 100644
--- a/roles/common/molecule/default/group_vars/parameters-optional.yml
+++ b/roles/common/molecule/default/group_vars/parameters-optional.yml
@@ -51,7 +51,7 @@ ntp_servers:
   - "0.debian.pool.ntp.org"
   - "1.debian.pool.ntp.org"
   - "2.debian.pool.ntp.org"
-maintenance: True
+maintenance: true
 maintenance_allowed_hosts:
   - client1