diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,9 @@
+0.2.1.0
+* Widen dependency on base.
+
+0.2.0.0
+* Introduce URIRef, a GADT representation of absolute and relative URIs.
+
 0.1.9.2
 * Fix bug wher trailing ampersand in the query section would not parse.
 
diff --git a/src/URI/ByteString/Internal.hs b/src/URI/ByteString/Internal.hs
--- a/src/URI/ByteString/Internal.hs
+++ b/src/URI/ByteString/Internal.hs
@@ -684,13 +684,13 @@
 -------------------------------------------------------------------------------
 -- | Combinator for tunnelling more specific error types through the
 -- attoparsec machinery using read/show.
-orFailWith :: (Show e, Read e) => Parser a -> e -> Parser' e a
+orFailWith :: (Show e) => Parser a -> e -> Parser' e a
 orFailWith p e = Parser' p <|> fail' e
 
 
 -------------------------------------------------------------------------------
 -- | Should be preferred to fail'
-fail' :: (Show e, Read e) => e -> Parser' e a
+fail' :: (Show e) => e -> Parser' e a
 fail' = fail . show
 
 
@@ -703,7 +703,7 @@
 
 -------------------------------------------------------------------------------
 -- | Stronger-typed variation of parseOnly'. Consumes all input.
-parseOnly' :: (Read e, Show e)
+parseOnly' :: (Read e)
               => (String -> e) -- ^ Fallback if we can't parse a failure message for the sake of totality.
               -> Parser' e a
               -> ByteString
diff --git a/uri-bytestring.cabal b/uri-bytestring.cabal
--- a/uri-bytestring.cabal
+++ b/uri-bytestring.cabal
@@ -1,5 +1,5 @@
 name:                uri-bytestring
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis:            Haskell URI parsing as ByteStrings
 description: uri-bytestring aims to be an RFC3986 compliant URI parser that uses efficient ByteStrings for parsing and representing the URI data.
 license:             BSD3
@@ -37,7 +37,7 @@
   build-depends:
 
       attoparsec       >= 0.10    && < 0.14
-    , base             >= 4.6     && < 4.9
+    , base             >= 4.6     && < 4.10
     , bytestring       >= 0.9.1   && < 0.11
     , blaze-builder    >= 0.3.0.0 && < 0.5