2 files changed, 7 insertions, 8 deletions
diff --git a/src/Text/Pandoc/Filter/JSON.hs b/src/Text/Pandoc/Filter/JSON.hs
index 7e27f7d94..83ec9a97c 100644
--- a/src/Text/Pandoc/Filter/JSON.hs
+++ b/src/Text/Pandoc/Filter/JSON.hs
@@ -23,7 +23,6 @@ import System.Directory (executable, doesFileExist, findExecutable,
 import System.Environment (getEnvironment)
 import System.Exit (ExitCode (..))
 import System.FilePath ((</>), takeExtension)
-import Text.Pandoc.Class.PandocIO (PandocIO)
 import Text.Pandoc.Error (PandocError (PandocFilterError))
 import Text.Pandoc.Definition (Pandoc)
 import Text.Pandoc.Options (ReaderOptions)
@@ -32,11 +31,12 @@ import Text.Pandoc.Shared (pandocVersion, tshow)
 import qualified Control.Exception as E
 import qualified Text.Pandoc.UTF8 as UTF8
 
-apply :: ReaderOptions
+apply :: MonadIO m
+      => ReaderOptions
       -> [String]
       -> FilePath
       -> Pandoc
-      -> PandocIO Pandoc
+      -> m Pandoc
 apply ropts args f = liftIO . externalFilter ropts f args
 
 externalFilter :: MonadIO m
diff --git a/src/Text/Pandoc/Filter/Lua.hs b/src/Text/Pandoc/Filter/Lua.hs
index a50e5217d..8df057bfa 100644
--- a/src/Text/Pandoc/Filter/Lua.hs
+++ b/src/Text/Pandoc/Filter/Lua.hs
@@ -17,8 +17,7 @@ import qualified Data.Text as T
 import Text.Pandoc.Class.PandocIO (PandocIO)
 import Text.Pandoc.Definition (Pandoc)
 import Text.Pandoc.Error (PandocError (PandocFilterError))
-import Text.Pandoc.Lua (Global (..), LuaException (..),
-                        runLua, runFilterFile, setGlobals)
+import Text.Pandoc.Lua (Global (..), runLua, runFilterFile, setGlobals)
 import Text.Pandoc.Options (ReaderOptions)
 
 -- | Run the Lua filter in @filterPath@ for a transformation to the
@@ -40,7 +39,7 @@ apply ropts args fp doc = do
                ]
     runFilterFile fp doc
 
-forceResult :: FilePath -> Either LuaException Pandoc -> PandocIO Pandoc
+forceResult :: FilePath -> Either PandocError Pandoc -> PandocIO Pandoc
 forceResult fp eitherResult = case eitherResult of
-  Right x               -> return x
-  Left (LuaException s) -> throw (PandocFilterError (T.pack fp) s)
+  Right x  -> return x
+  Left err -> throw (PandocFilterError (T.pack fp) (T.pack $ show err))