diff --git a/hs2ats.cabal b/hs2ats.cabal
--- a/hs2ats.cabal
+++ b/hs2ats.cabal
@@ -1,5 +1,5 @@
 name:                hs2ats
-version:             0.2.0.0
+version:             0.2.0.1
 synopsis:            Create ATS types from Haskell types
 description:         This package enables scanning Haskell source files for data types and then generating [ATS](http://www.ats-lang.org/) types from them.
 homepage:            https://github.com/vmchale/hs2ats#readme
diff --git a/src/Language/ATS/Generate.hs b/src/Language/ATS/Generate.hs
--- a/src/Language/ATS/Generate.hs
+++ b/src/Language/ATS/Generate.hs
@@ -21,7 +21,7 @@
 import qualified Data.Text                    as T
 import           Language.ATS                 as ATS
 import           Language.ATS.Generate.Error
-import           Language.Haskell.Exts.Parser
+import           Language.Haskell.Exts
 import           Language.Haskell.Exts.Syntax as HS
 import           Options.Generic
 
@@ -125,10 +125,14 @@
 modulePrint = g . fmap asATSType . filterModule
     where g = (printATS . ATS . reverse . rights) &&& lefts
 
+extends :: ParseMode
+extends = defaultParseMode
+    { extensions = [EnableExtension StandaloneDeriving] }
+
 generateATS :: String -> ErrM (String, [GenerateError])
-generateATS hsSrc = modulePrint <$> case parseModule hsSrc of
-    ParseOk x           -> Right x
-    ParseFailed loc msg -> syntaxError loc msg
+generateATS hsSrc = modulePrint <$> case parseModuleWithMode extends hsSrc of
+    ParseOk x            -> Right x
+    ParseFailed loc' msg -> syntaxError loc' msg
 
 genATSTypes :: FilePath -> FilePath -> IO ()
 genATSTypes p p' = do