diff --git a/jsonifier.cabal b/jsonifier.cabal
--- a/jsonifier.cabal
+++ b/jsonifier.cabal
@@ -1,5 +1,5 @@
 name: jsonifier
-version: 0.2.1
+version: 0.2.1.1
 synopsis: Fast and simple JSON encoding toolkit
 description:
   Minimalistic library for encoding JSON directly to strict bytestring,
diff --git a/library/Jsonifier.hs b/library/Jsonifier.hs
--- a/library/Jsonifier.hs
+++ b/library/Jsonifier.hs
@@ -89,14 +89,14 @@
 -- |
 -- JSON @true@ Boolean literal.
 {-# INLINE true #-}
-true :: Bool -> Json
+true :: Json
 true =
   write 4 Poke.true
 
 -- |
 -- JSON @false@ Boolean literal.
 {-# INLINE false #-}
-false :: Bool -> Json
+false :: Json
 false =
   write 5 Poke.false