diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 Changelog
 
+# [1.1.0](https://github.com/drlkf/megaparsec-utils/compare/1.0.0...1.1.0) (2025-07-28)
+
+
+### Features
+
+* add on/off to booleans ([1e9b885](https://github.com/drlkf/megaparsec-utils/commit/1e9b88532ec86ef3bf229de01c0a5a81a89261ec))
+
 # 1.0.0 (2025-07-28)
 
 
diff --git a/megaparsec-utils.cabal b/megaparsec-utils.cabal
--- a/megaparsec-utils.cabal
+++ b/megaparsec-utils.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           megaparsec-utils
-version:        0.1.0.0
+version:        0.1.1.0
 synopsis:       Parsers and utilities for the Megaparsec library.
 description:    Common parsers and utilities to use with the Megaparsec library.
 category:       Parsing
diff --git a/src/Text/Megaparsec/Utils.hs b/src/Text/Megaparsec/Utils.hs
--- a/src/Text/Megaparsec/Utils.hs
+++ b/src/Text/Megaparsec/Utils.hs
@@ -51,15 +51,15 @@
  )
 import Text.Read (readMaybe)
 
--- | Parse a case-insensitive human-readable boolean, including C-style numbers
--- and English yes-no.
+-- | Parse a case-insensitive human-readable boolean, including C-style numbers,
+-- English yes-no and @on@ / @off@.
 boolParser
   :: Ord e
   => Parsec e String Bool
 boolParser = true <|> false
  where
-  true = True <$ choice (map string' ["true", "y", "yes", "1"])
-  false = False <$ choice (map string' ["false", "n", "no", "0"])
+  true = True <$ choice (map string' ["true", "y", "yes", "on", "1"])
+  false = False <$ choice (map string' ["false", "n", "no", "off", "0"])
 
 -- | Parse a 'Bounded' 'Enum' type that has a 'Show' instance, trying all
 -- possibilities, case-insensitive, in the 'Enum' order.