diff --git a/Graphics/Typography/Geometry/Outlines.lhs b/Graphics/Typography/Geometry/Outlines.lhs
--- a/Graphics/Typography/Geometry/Outlines.lhs
+++ b/Graphics/Typography/Geometry/Outlines.lhs
@@ -16,7 +16,7 @@
 import Graphics.Typography.Geometry.Bezier
 import Graphics.Typography.Geometry
 import Data.List (sort)
-import qualified Data.Map as M
+import qualified Data.Map.Strict as M
 import qualified Data.Vector as V
 
 import Control.Parallel
@@ -110,7 +110,7 @@
 data Topology=Dedans | SurLaLigne | Dehors deriving (Eq, Ord, Show)
 
 minsert::Ord a=>a->b->M.Map a [b]->M.Map a [b]
-minsert x y m=M.insertWith' (++) x [y] m
+minsert x y m=M.insertWith (++) x [y] m
 
 munion::Ord a=>M.Map a [b]->M.Map a [b]->M.Map a [b]
 munion=M.unionWith (++)
diff --git a/typography-geometry.cabal b/typography-geometry.cabal
--- a/typography-geometry.cabal
+++ b/typography-geometry.cabal
@@ -1,11 +1,11 @@
 Name:		typography-geometry
-Version: 	1.0.0.1
+Version: 	1.0.1.0
 Synopsis:	Drawings for printed text documents
 Description: 	Drawings for printed text documents
 Category:	Typography
 Author:         Pierre-Etienne Meunier <pierreetienne.meunier@gmail.com>
 Maintainer:	Jean-Philippe Bernardy <jeanphilippe.bernardy@gmail.com>
-License:	GPL
+License:	GPL-2
 License-file:	LICENSE
 Build-Type:	Simple
 Cabal-Version:	>=1.6