diff --git a/fixed-generic.cabal b/fixed-generic.cabal
--- a/fixed-generic.cabal
+++ b/fixed-generic.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           fixed-generic
-version:        0.1.0.1
+version:        0.1.0.2
 synopsis:       Fixed-point number build on generic integral number
 description:    Please see the README on GitHub at <https://github.com/YoshikuniJujo/fixed-generic#readme>
 category:       Numeric
diff --git a/src/Data/Fixed/Generic.hs b/src/Data/Fixed/Generic.hs
--- a/src/Data/Fixed/Generic.hs
+++ b/src/Data/Fixed/Generic.hs
@@ -11,7 +11,7 @@
 import Data.Data
 import Data.Fixed
 
-newtype F (a :: k) n = MkF n deriving (Eq, Ord)
+newtype F (a :: k) n = MkF n deriving (Eq, Ord, Bounded)
 
 tyF :: DataType
 tyF = mkDataType "Data.Fixed.Generic.F" [conMkF]