diff --git a/ansiblelater/rules/CheckLiteralBoolFormat.py b/ansiblelater/rules/CheckLiteralBoolFormat.py
index 70013b4..71e9ebb 100644
--- a/ansiblelater/rules/CheckLiteralBoolFormat.py
+++ b/ansiblelater/rules/CheckLiteralBoolFormat.py
@@ -6,19 +6,21 @@ from ansiblelater.standard import StandardBase
 class CheckLiteralBoolFormat(StandardBase):
 
     sid = "ANSIBLE0014"
-    description = "Literal bools should start with a capital letter"
-    helptext = "literal bools should be written as `True/False` or `yes/no`"
+    description = "Literal bools should be consistent"
+    helptext = "literal bools should be written as `{bools}`"
     version = "0.1"
     types = ["playbook", "task", "handler", "rolevars", "hostvars", "groupvars"]
 
     def check(self, candidate, settings):
         yamllines, errors = self.get_normalized_yaml(candidate, settings)
 
-        uppercase_bool = re.compile(r"([=!]=|:)\s*(true|false|TRUE|FALSE|Yes|No|YES|NO)\s*$")
+        litera_bools = re.compile(r"(?:[=!]=|:)\s*(true|false|yes|no|on|off)\s*$", re.IGNORECASE)
+        allowed = settings["ansible"]["literal-bools"]
 
         if not errors:
             for i, line in yamllines:
-                if uppercase_bool.findall(line):
-                    errors.append(self.Error(i, self.helptext))
+                matches = litera_bools.findall(line)
+                if any(m not in allowed for m in matches):
+                    errors.append(self.Error(i, self.helptext.format(bools=", ".join(allowed))))
 
         return self.Result(candidate.path, errors)
diff --git a/ansiblelater/settings.py b/ansiblelater/settings.py
index fcf57f7..e3266c5 100644
--- a/ansiblelater/settings.py
+++ b/ansiblelater/settings.py
@@ -134,6 +134,7 @@ class Settings(object):
                     "min-spaces-inside": 1,
                     "max-spaces-inside": 1,
                 },
+                "literal-bools": ["True", "False", "yes", "no"],
             },
             "yamllint": {
                 "empty-lines": {
diff --git a/docs/content/configuration/defaults.md b/docs/content/configuration/defaults.md
index 6897254..ff1b1d8 100644
--- a/docs/content/configuration/defaults.md
+++ b/docs/content/configuration/defaults.md
@@ -19,6 +19,13 @@ ansible:
     max-spaces-inside: 1
     min-spaces-inside: 1
 
+  # List of allowed literal bools (ANSIBLE0014)
+  literal-bools:
+    - "True"
+    - "False"
+    - "yes"
+    - "no"
+
 # Global logging configuration
 # If you would like to force colored output (e.g. non-tty)
 # set environment variable `PY_COLORS=1`
diff --git a/docs/content/included_rules/_index.md b/docs/content/included_rules/_index.md
index 1731686..85d55d5 100644
--- a/docs/content/included_rules/_index.md
+++ b/docs/content/included_rules/_index.md
@@ -18,7 +18,7 @@ Reviews are nothing without some rules or standards against which to review. ans
 | CheckLineBetweenTasks         | ANSIBLE0001 | Single tasks should be separated by an empty line.                |                                                                      |
 | CheckMetaMain                 | ANSIBLE0002 | Meta file should contain a basic subset of parameters.            | author, description, min_ansible_version, platforms, dependencies    |
 | CheckUniqueNamedTask          | ANSIBLE0003 | Tasks and handlers must be uniquely named within a file.          |                                                                      |
-| CheckBraces                   | ANSIBLE0004 | YAML should use consistent number of spaces around variables.     |                                                                      |
+| CheckBraces                   | ANSIBLE0004 | YAML should use consistent number of spaces around variables.     | {double-braces: max-spaces-inside: 1, min-spaces-inside: 1}          |
 | CheckScmInSrc                 | ANSIBLE0005 | Use SCM key rather than `src: scm+url` in requirements file.      |                                                                      |
 | CheckNamedTask                | ANSIBLE0006 | Tasks and handlers must be named.                                 | excludes: meta, debug, include\_\*, import\_\*, block                |
 | CheckNameFormat               | ANSIBLE0007 | Name of tasks and handlers must be formatted.                     | formats: first letter capital                                        |
@@ -28,7 +28,7 @@ Reviews are nothing without some rules or standards against which to review. ans
 | CheckCommandHasChanges        | ANSIBLE0011 | Commands should be idempotent and only used with some checks.     |                                                                      |
 | CheckCompareToEmptyString     | ANSIBLE0012 | Don't compare to "" - use `when: var` or `when: not var`.         |                                                                      |
 | CheckCompareToLiteralBool     | ANSIBLE0013 | Don't compare to True/False - use `when: var` or `when: not var`. |                                                                      |
-| CheckLiteralBoolFormat        | ANSIBLE0014 | Literal bools should be written as `True/False` or `yes/no`.      | forbidden values are `true false TRUE FALSE Yes No YES NO`           |
+| CheckLiteralBoolFormat        | ANSIBLE0014 | Literal bools should be consistent.                               | {literal-bools: [True, False, yes, no]}                              |
 | CheckBecomeUser               | ANSIBLE0015 | Become should be combined with become_user.                       |                                                                      |
 | CheckFilterSeparation         | ANSIBLE0016 | Jinja2 filters should be separated with spaces.                   |                                                                      |
 | CheckCommandInsteadOfArgument | ANSIBLE0017 | Commands should not be used in place of module arguments.         |                                                                      |