diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Francesco Gazzetta
+Copyright (c) 2016-2018 Francesco Gazzetta
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -6,11 +6,14 @@
 
 Heavily inspired by [gloss](http://gloss.ouroborus.net/).
 
-**demo** (compiled tests) [here](http://fgaz.me/shine/tests)
+**demo** (compiled tests) [here](http://fgaz.github.io/shine/tests)
 
 ## Compiling
 
 You need [ghcjs](https://github.com/ghcjs/ghcjs)
+
+A great way of building ghcjs packages is to use the
+[reflex platform](https://github.com/reflex-frp/reflex-platform)
 
 ## Usage
 
diff --git a/shine.cabal b/shine.cabal
--- a/shine.cabal
+++ b/shine.cabal
@@ -1,10 +1,10 @@
 name: shine
-version: 0.2.0.2
+version: 0.2.0.3
 cabal-version: >=1.8
 build-type: Simple
 license: MIT
 license-file: LICENSE
-copyright: (c) 2016-2017 Francesco Gazzetta
+copyright: (c) 2016-2018 Francesco Gazzetta
 author: Francesco Gazzetta
 maintainer: Francesco Gazzetta <francygazz@gmail.com>
 stability: experimental
@@ -30,7 +30,7 @@
                      Graphics.Shine.Image,
                      Graphics.Shine.Picture,
                      Graphics.Shine.Render
-    build-depends: base >=4.2 && <5,
+    build-depends: base >=4.11 && <4.13,
                    ghcjs-dom >=0.9 && <0.10,
                    ghcjs-prim,
                    keycode >=0.2 && <0.3,
diff --git a/src/Graphics/Shine/Picture.hs b/src/Graphics/Shine/Picture.hs
--- a/src/Graphics/Shine/Picture.hs
+++ b/src/Graphics/Shine/Picture.hs
@@ -74,9 +74,15 @@
 path :: [(Double, Double)] -> Picture
 path xs = foldMap (\((x,y),(x',y')) -> Line x y x' y') $ zip xs $ tail xs
 
+-- | 'Picture's are 'Semigroup's. The composing function is the overlapping
+-- (the right picture is drawn over the left one).
+instance Semigroup Picture where
+    (<>) = Over
+
 -- | 'Picture's are 'Monoid's. The identity is an 'Empty' (completely transparent)
 -- picture and the composing function is the overlapping (the right picture is
 -- drawn over the left one).
 instance Monoid Picture where
     mempty = Empty
     mappend = Over
+