diff --git a/SGdemo.cabal b/SGdemo.cabal
--- a/SGdemo.cabal
+++ b/SGdemo.cabal
@@ -1,5 +1,5 @@
 name:                SGdemo
-version:             1.0.1
+version:             1.1
 synopsis:            An example of using the SG and OpenGL libraries
 description:         This program serves as a demonstration of the functions of the SG library
                      (to be found on Hackage:
@@ -14,7 +14,7 @@
 maintainer:          neil@twistedsquare.com
 copyright:           Copyright (c) 2009, Neil Brown
 stability:           Provisional
-build-depends:       base > 3 && < 5, SG, OpenGL < 2.3, GLUT < 2.2
+build-depends:       base > 3 && < 5, SG, GLUT >=2.2 && <2.3, OpenGL >=2.4 && <2.5
 build-type:          Simple
 
 executable:          sgdemo
diff --git a/SGdemo.hs b/SGdemo.hs
--- a/SGdemo.hs
+++ b/SGdemo.hs
@@ -284,7 +284,7 @@
                  | (n, s) <- zip [0..] $ reverse strLines]
 
 draftColour, drawnColour, reflectColour, slColour, ssColour, llColour, lpColour,
-  textColour :: Color4 GLclampf
+  textColour :: Color4 GLfloat
 textColour = Color4 0 0 0.5 0
 -- For things relating to the cursor:
 draftColour = Color4 1 0 0 0
@@ -374,6 +374,7 @@
              return (Point2 ( (conv x / conv w) - 0.5
                             , negate (conv y / conv h) + 0.5))
 
+      conv :: (Integral a, Num b) => a -> b
       conv = fromInteger . toInteger
       moveCursor p = do w <- readIORef world
                         writeIORef world $ w { cursor = p }