diff --git a/language-python-test.cabal b/language-python-test.cabal
--- a/language-python-test.cabal
+++ b/language-python-test.cabal
@@ -1,12 +1,12 @@
 name:                language-python-test
-version:             0.5.4
-cabal-version:       >= 1.6
+version:             0.5.8
+cabal-version:       >= 1.10 
 synopsis:            testing code for the language-python library
 description:         testing code for the language-python library
 category:            Language
 license:             BSD3
 license-file:        LICENSE
-copyright:           (c) 2014-2016 Bernard James Pope
+copyright:           (c) 2014-2019 Bernard James Pope
 author:              Bernard James Pope (Bernie Pope)
 maintainer:          florbitous@gmail.com
 homepage:            http://github.com/bjpop/language-python-test
@@ -18,22 +18,25 @@
    location: https://github.com/bjpop/language-python-test
 
 Executable language-python-roundtrip
+   default-language: Haskell2010
    hs-source-dirs:
       ./src
    main-is: RoundTrip.hs
    other-modules:
-   build-depends:    base == 4.*, language-python == 0.5.4
+   build-depends:    base == 4.*, language-python == 0.5.8
 
 Executable language-python-tokens
+   default-language: Haskell2010
    hs-source-dirs:
       ./src
    main-is: Tokens.hs
    other-modules:
-   build-depends:    base == 4.*, language-python == 0.5.4
+   build-depends:    base == 4.*, language-python == 0.5.8
 
 Executable language-python-parse-pretty
+   default-language: Haskell2010
    hs-source-dirs:
       ./src
    main-is: ParsePretty.hs
    other-modules:
-   build-depends:    base == 4.*, language-python == 0.5.4
+   build-depends:    base == 4.*, language-python == 0.5.8
diff --git a/src/RoundTrip.hs b/src/RoundTrip.hs
--- a/src/RoundTrip.hs
+++ b/src/RoundTrip.hs
@@ -27,7 +27,7 @@
                if test then exitWith ExitSuccess else exitSuccess
       _other -> putStrLn "Incorrect command line. Expected: <2|3|n> inputFileName"
 
-check :: [Comparison] -> IO Bool 
+check :: [Comparison] -> IO Bool
 check [] = return True -- must have all been equal
 check (Equal:rest) = check rest
 check (NotEqual s1 s2:_rest) = do