diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # sexpr-parser
 
+[![Travis branch](https://img.shields.io/travis/rcook/sexpr-parser/master.svg)](https://travis-ci.org/rcook/sexpr-parser)
+[![Hackage](https://img.shields.io/hackage/v/sexpr-parser.svg)](http://hackage.haskell.org/package/sexpr-parser)
+[![Licence](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/rcook/sexpr-parser/master/LICENSE)
+
 S-expression parser in Haskell
 
 ## Description
diff --git a/lib/Text/SExpression.hs b/lib/Text/SExpression.hs
--- a/lib/Text/SExpression.hs
+++ b/lib/Text/SExpression.hs
@@ -51,7 +51,7 @@
 >         Right (satResult, funs) -> do
 >             for_ funs $ \(name, value) ->
 >                 putStrLn $ printf "%s = %s" name (if value then "1" else "0")
->             putStrLn $ "result=" ++ show satResult
+>             putStrLn $ printf "result=%s" (show satResult)
 >
 > parseZ3SATResult :: Parser Z3SATResult
 > parseZ3SATResult = do
diff --git a/lib/Text/SExpression/Internal.hs b/lib/Text/SExpression/Internal.hs
--- a/lib/Text/SExpression/Internal.hs
+++ b/lib/Text/SExpression/Internal.hs
@@ -12,6 +12,8 @@
 
 {-# OPTIONS_GHC -Wall -Werror #-}
 
+{-# LANGUAGE CPP #-}
+
 module Text.SExpression.Internal
     ( -- * S-expression parser
       parseSExpr
@@ -30,6 +32,10 @@
     ( (<|>)
     , endBy
     , many
+#if MIN_VERSION_GLASGOW_HASKELL(8,6,0,0)
+    , noneOf
+    , oneOf
+#endif
     , sepBy
     , some
     , try
@@ -38,8 +44,10 @@
     ( char
     , digitChar
     , letterChar
+#if !MIN_VERSION_GLASGOW_HASKELL(8,6,0,0)
     , noneOf
     , oneOf
+#endif
     , space1
     )
 import Text.Megaparsec.Char.Lexer
diff --git a/sexpr-parser.cabal b/sexpr-parser.cabal
--- a/sexpr-parser.cabal
+++ b/sexpr-parser.cabal
@@ -1,5 +1,5 @@
 name:                   sexpr-parser
-version:                0.1.0.0
+version:                0.1.1.0
 synopsis:               Simple s-expression parser
 description:
   This package provides a simple Megaparsec-based s-expression parser.
diff --git a/z3-demo/Main.hs b/z3-demo/Main.hs
--- a/z3-demo/Main.hs
+++ b/z3-demo/Main.hs
@@ -45,7 +45,7 @@
         Right (satResult, funs) -> do
             for_ funs $ \(name, value) ->
                 putStrLn $ printf "%s = %s" name (if value then "1" else "0")
-            putStrLn $ "result=" ++ show satResult
+            putStrLn $ printf "result=%s" (show satResult)
 
 parseZ3SATResult :: Parser Z3SATResult
 parseZ3SATResult = do