diff --git a/Fractal/RUFF/Mandelbrot/Address.hs b/Fractal/RUFF/Mandelbrot/Address.hs
--- a/Fractal/RUFF/Mandelbrot/Address.hs
+++ b/Fractal/RUFF/Mandelbrot/Address.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE FlexibleContexts #-}
 {- |
 Module      :  Fractal.RUFF.Mandelbrot.Address
 Copyright   :  (c) Claude Heiland-Allen 2010,2011,2015
diff --git a/Fractal/RUFF/Mandelbrot/Image.hs b/Fractal/RUFF/Mandelbrot/Image.hs
--- a/Fractal/RUFF/Mandelbrot/Image.hs
+++ b/Fractal/RUFF/Mandelbrot/Image.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE BangPatterns, DeriveDataTypeable #-}
+{-# LANGUAGE BangPatterns, DeriveDataTypeable, FlexibleContexts #-}
 {- |
 Module      :  Fractal.RUFF.Mandelbrot.Image
 Copyright   :  (c) Claude Heiland-Allen 2011,2015
diff --git a/Fractal/RUFF/Types/Ratio.hs b/Fractal/RUFF/Types/Ratio.hs
--- a/Fractal/RUFF/Types/Ratio.hs
+++ b/Fractal/RUFF/Types/Ratio.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE ConstrainedClassMethods #-}
 {- |
 Module      :  Fractal.RUFF.Types.Ratio
 Copyright   :  (c) Claude Heiland-Allen 2015
diff --git a/ruff.cabal b/ruff.cabal
--- a/ruff.cabal
+++ b/ruff.cabal
@@ -1,5 +1,5 @@
 Name:                ruff
-Version:             0.4
+Version:             0.4.0.1
 Synopsis:            relatively useful fractal functions
 Description:
     A library for analysis and exploration of fractals, providing
@@ -7,7 +7,7 @@
     bond point finding, and iterations for images of the Mandelbrot
     Set.
 
-Homepage:            https://gitorious.org/ruff
+Homepage:            http://code.mathr.co.uk/ruff
 License:             BSD3
 License-file:        LICENSE
 Author:              Claude Heiland-Allen
@@ -35,13 +35,12 @@
                       strict >= 0.3.2 && < 0.4,
                       Vec >= 1 && < 2
   GHC-Options:        -Wall
-  GHC-Prof-Options:   -prof -auto-all -caf-all
 
 source-repository head
   type:     git
-  location: git://gitorious.org/ruff/ruff.git
+  location: http://code.mathr.co.uk/ruff.git
 
 source-repository this
   type:     git
-  location: git://gitorious.org/ruff/ruff.git
-  tag:      v0.4
+  location: http://code.mathr.co.uk/ruff.git
+  tag:      v0.4.0.1