diff --git a/src/Network/Gitit/Authentication.hs b/src/Network/Gitit/Authentication.hs
index 4c240e7..b41d87d 100644
--- a/src/Network/Gitit/Authentication.hs
+++ b/src/Network/Gitit/Authentication.hs
@@ -44,8 +44,8 @@ import System.Exit
 import System.Log.Logger (logM, Priority(..))
 import Data.Char (isAlphaNum, isAlpha)
 import qualified Data.Map as M
-import Text.Pandoc.Shared (substitute)
 import Data.Maybe (isJust, fromJust, isNothing, fromMaybe)
+import Data.List (stripPrefix)
 import Network.URL (exportURL, add_param, importURL)
 import Network.BSD (getHostName)
 import qualified Text.StringTemplate as T
@@ -54,6 +54,15 @@ import Codec.Binary.UTF8.String (encodeString)
 import Data.ByteString.UTF8 (toString)
 import Network.Gitit.Rpxnow as R
 
+-- Taken from Pandoc-2.11.4, no longer exported since 2.12:
+substitute :: (Eq a) => [a] -> [a] -> [a] -> [a]
+substitute _ _ [] = []
+substitute [] _ xs = xs
+substitute target replacement lst@(x:xs) =
+    case stripPrefix target lst of
+      Just lst' -> replacement ++ substitute target replacement lst'
+      Nothing   -> x : substitute target replacement xs
+
 data ValidationType = Register
                     | ResetPassword
                     deriving (Show,Read)
diff --git a/src/Network/Gitit/Util.hs b/src/Network/Gitit/Util.hs
index c5e9fe5..9588b3a 100644
--- a/src/Network/Gitit/Util.hs
+++ b/src/Network/Gitit/Util.hs
@@ -45,7 +45,7 @@ import Network.URL (encString)
 
 -- | Read file as UTF-8 string.  Encode filename as UTF-8.
 readFileUTF8 :: FilePath -> IO Text
-readFileUTF8 = fmap T.pack . UTF8.readFile
+readFileUTF8 = UTF8.readFile
 
 -- | Perform a function a directory and return to working directory.
 inDir :: FilePath -> IO a -> IO a