diff --git a/config-value.cabal b/config-value.cabal
index 295ded9..0c43825 100644
--- a/config-value.cabal
+++ b/config-value.cabal
@@ -48,7 +48,7 @@ library
 
   build-tool-depends:
     alex:alex   >= 3.2,
-    happy:happy >= 1.19 && <1.21,
+    happy:happy >= 1.19 && <2.1,
 
   hs-source-dirs:      src
   default-language:    Haskell2010
diff --git a/src/Config/Number.hs b/src/Config/Number.hs
index c89023c..c207233 100644
--- a/src/Config/Number.hs
+++ b/src/Config/Number.hs
@@ -42,8 +42,7 @@ data Number = MkNumber
   }
   deriving (Eq, Ord, Read, Show, Data, Generic)
 
--- | Radix used for a number. Some radix modes support an
--- exponent.
+-- | Radix used for a number. Some radix modes support an exponent.
 data Radix
   = Radix2           -- ^ binary, base 2
   | Radix8           -- ^ octal, base 8