diff --git a/Data/Aeson/Parser/Internal.hs b/Data/Aeson/Parser/Internal.hs
--- a/Data/Aeson/Parser/Internal.hs
+++ b/Data/Aeson/Parser/Internal.hs
@@ -43,7 +43,7 @@
 
 import Control.Applicative ((*>), (<$>), (<*), liftA2, pure)
 import Data.Aeson.Types (Result(..), Value(..))
-import Data.Attoparsec.Char8 (Parser, char, endOfInput, rational,
+import Data.Attoparsec.Char8 (Parser, char, endOfInput, scientific,
                               skipSpace, string)
 import Data.Bits ((.|.), shiftL)
 import Data.ByteString (ByteString)
@@ -173,7 +173,7 @@
     C_t           -> string "true" *> pure (Bool True)
     C_n           -> string "null" *> pure Null
     _              | w >= 48 && w <= 57 || w == 45
-                  -> Number <$> rational
+                  -> Number <$> scientific
       | otherwise -> fail "not a valid json value"
 
 -- | Strict version of 'value'. See also 'json''.
@@ -191,7 +191,7 @@
     C_n           -> string "null" *> pure Null
     _              | w >= 48 && w <= 57 || w == 45
                   -> do
-                     !n <- rational
+                     !n <- scientific
                      return (Number n)
       | otherwise -> fail "not a valid json value"
 
diff --git a/aeson.cabal b/aeson.cabal
--- a/aeson.cabal
+++ b/aeson.cabal
@@ -1,5 +1,5 @@
 name:            aeson
-version:         0.7.0.5
+version:         0.7.0.6
 license:         BSD3
 license-file:    LICENSE
 category:        Text, Web, JSON