diff --git a/hoodle-render.cabal b/hoodle-render.cabal
--- a/hoodle-render.cabal
+++ b/hoodle-render.cabal
@@ -1,5 +1,5 @@
 Name:		hoodle-render
-Version:	0.1
+Version:	0.1.0
 Synopsis:       Hoodle file renderer
 Description: 	Rendering library using cairo for hoodle file format
 License: 	BSD3
diff --git a/src/Graphics/Hoodle/Render/Background.hs b/src/Graphics/Hoodle/Render/Background.hs
--- a/src/Graphics/Hoodle/Render/Background.hs
+++ b/src/Graphics/Hoodle/Render/Background.hs
@@ -25,6 +25,8 @@
 import           Graphics.Rendering.Cairo
 --
 #ifdef POPPLER
+import qualified Data.ByteString.Char8 as C
+import           Data.Monoid
 import qualified Graphics.UI.Gtk.Poppler.Document as Poppler
 import qualified Graphics.UI.Gtk.Poppler.Page as PopplerPage
 #endif