diff --git a/src/Text/Pandoc/Class/IO.hs b/src/Text/Pandoc/Class/IO.hs
index e39fb11f9fc4..2d337d942779 100644
--- a/src/Text/Pandoc/Class/IO.hs
+++ b/src/Text/Pandoc/Class/IO.hs
@@ -37,7 +37,6 @@ module Text.Pandoc.Class.IO
 
 import Control.Monad.Except (throwError)
 import Control.Monad.IO.Class (MonadIO, liftIO)
-import Data.ByteString.Base64 (decodeLenient)
 import Data.ByteString.Lazy (toChunks)
 import Data.Text (Text, pack, unpack)
 import Data.Time (TimeZone, UTCTime)