diff --git a/pandoc.cabal b/pandoc.cabal
index e2297b9ad..fde76dee4 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -324,7 +324,7 @@ library
                  yaml >= 0.8.8.2 && < 0.9,
                  scientific >= 0.2 && < 0.4,
                  vector >= 0.10 && < 0.13,
-                 hslua >= 0.8 && < 0.9,
+                 hslua >= 0.9 && < 0.10,
                  binary >= 0.5 && < 0.9,
                  SHA >= 1.6 && < 1.7,
                  haddock-library >= 1.1 && < 1.5,
@@ -551,7 +551,7 @@ test-suite test-pandoc
                   text >= 0.11 && < 1.3,
                   directory >= 1 && < 1.4,
                   filepath >= 1.1 && < 1.5,
-                  hslua >= 0.8 && < 0.9,
+                  hslua >= 0.9 && < 0.10,
                   process >= 1.2.3 && < 1.7,
                   skylighting >= 0.4 && < 0.5,
                   temporary >= 1.1 && < 1.3,
diff --git a/src/Text/Pandoc/Lua/PandocModule.hs b/src/Text/Pandoc/Lua/PandocModule.hs
index f9b072dff..3c27ecffb 100644
--- a/src/Text/Pandoc/Lua/PandocModule.hs
+++ b/src/Text/Pandoc/Lua/PandocModule.hs
@@ -16,9 +16,6 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 -}
 {-# LANGUAGE CPP #-}
-#if !MIN_VERSION_hslua(0,9,0)
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-#endif
 {- |
    Module      : Text.Pandoc.Lua.PandocModule
    Copyright   : Copyright © 2017 Albert Krewinkel
@@ -40,7 +37,7 @@ import Data.Default (Default (..))
 import Data.IORef
 import Data.Maybe (fromMaybe)
 import Data.Text (pack)
-import Foreign.Lua (Lua, FromLuaStack, ToLuaStack, NumResults, liftIO)
+import Foreign.Lua (Lua, FromLuaStack, NumResults, liftIO)
 import Foreign.Lua.FunctionCalling (ToHaskellFunction)
 import Text.Pandoc.Class (readDataFile, runIO,
                           runIOorExplode, setUserDataDir, CommonState(..),
@@ -186,11 +183,3 @@ instance FromLuaStack a => FromLuaStack (OrNil a) where
     if noValue
       then return (OrNil Nothing)
       else OrNil . Just <$> Lua.peek idx
-
-#if !MIN_VERSION_hslua(0,9,0)
-instance ToLuaStack BL.ByteString where
-  push = Lua.push . BL.toStrict
-
-instance FromLuaStack BL.ByteString where
-  peek = fmap BL.fromStrict . Lua.peek
-#endif
diff --git a/stack.full.yaml b/stack.full.yaml
index 71bbbcb0f..8b82c3e67 100644
--- a/stack.full.yaml
+++ b/stack.full.yaml
@@ -20,6 +20,6 @@ packages:
 - '../pandoc-types'
 - '../texmath'
 extra-deps:
-- hslua-0.8.0
+- hslua-0.9.0
 - skylighting-0.3.3
 resolver: lts-8.12
diff --git a/stack.pkg.yaml b/stack.pkg.yaml
index 5fdde5ab2..5ad4beb95 100644
--- a/stack.pkg.yaml
+++ b/stack.pkg.yaml
@@ -19,7 +19,7 @@ packages:
 extra-deps:
 - pandoc-types-1.17.2
 - texmath-0.9.4.4
-- hslua-0.8.0
+- hslua-0.9.0
 - skylighting-0.4.1
 - cmark-gfm-0.1.1
 - QuickCheck-2.10.0.1
diff --git a/stack.yaml b/stack.yaml
index 5351f6715..d4d7a7b4f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -9,7 +9,7 @@ packages:
 extra-deps:
 - pandoc-types-1.17.2
 - texmath-0.9.4.4
-- hslua-0.8.0
+- hslua-0.9.0
 - skylighting-0.4.1
 - cmark-gfm-0.1.1
 - QuickCheck-2.10.0.1