diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@
     , address :: String
     } deriving (Generic, Show)
 
-instance FromJSON Contact where
+instance FromJSON Contact
 
 printContacts :: [Contact] -> IO ()
 printContacts = mapM_ print
diff --git a/aeson-parsec-picky.cabal b/aeson-parsec-picky.cabal
--- a/aeson-parsec-picky.cabal
+++ b/aeson-parsec-picky.cabal
@@ -6,7 +6,7 @@
 -- PVP summary:     +-+------- breaking API changes
 --                  | | +----- non-breaking API additions
 --                  | | | +--- code changes with no API change
-version:            0.1.0.0
+version:            0.1.0.1
 
 -- A short (one-line) description of the package.
 synopsis:           Alternative JSON parser based on Parsec and Aeson
@@ -67,7 +67,7 @@
   -- Directories containing source files.
   hs-source-dirs:   src
 
-  ghc-options:      -Wall
+  ghc-options:      -Wall -fwarn-tabs -fwarn-implicit-prelude
 
   -- Base language which the package is written in.
   default-language: Haskell2010
@@ -79,4 +79,4 @@
 source-repository this
   type:             git
   location:         https://github.com/FPBrno/aeson-parsec-picky
-  tag:              v0.1.0.0
+  tag:              v0.1.0.1
diff --git a/src/Data/Aeson/Parser/Parsec/Picky.hs b/src/Data/Aeson/Parser/Parsec/Picky.hs
--- a/src/Data/Aeson/Parser/Parsec/Picky.hs
+++ b/src/Data/Aeson/Parser/Parsec/Picky.hs
@@ -127,7 +127,7 @@
 baseNumber = read . concat <$> sequence
     [ opt $ P.string "-"
     , P.string "0" <|> many1 digit
-    , opt $ (:) <$> char ':' <*> many1 digit
+    , opt $ (:) <$> char '.' <*> many1 digit
     , opt $ concat <$> sequence
         [ P.string "e" <|> P.string "E"
         , opt $ P.string "+" <|> P.string "-"