diff --git a/Data/Colour.hs b/Data/Colour.hs
--- a/Data/Colour.hs
+++ b/Data/Colour.hs
@@ -41,7 +41,7 @@
  ,AffineSpace(..), blend
 
  ,ColourOps(..)
- ,disolve, atop
+ ,dissolve, atop
  )
 where
 
diff --git a/Data/Colour/Internal.hs b/Data/Colour/Internal.hs
--- a/Data/Colour/Internal.hs
+++ b/Data/Colour/Internal.hs
@@ -102,12 +102,12 @@
 opaque c = RGBA c Chan.full
 
 -- |Returns an 'AlphaColour' more transparent by a factor of @o@.
-disolve :: (Num a) => a -> AlphaColour a -> AlphaColour a
-disolve o (RGBA c a) = RGBA (darken o c) (Chan.scale o a)
+dissolve :: (Num a) => a -> AlphaColour a -> AlphaColour a
+dissolve o (RGBA c a) = RGBA (darken o c) (Chan.scale o a)
 
 -- |Creates an 'AlphaColour' from a 'Colour' with a given opacity.
 --
--- >c `withOpacity` o == disolve o (opaque c) 
+-- >c `withOpacity` o == dissolve o (opaque c) 
 withOpacity :: (Num a) => Colour a -> a -> AlphaColour a
 c `withOpacity` o = RGBA (darken o c) (Chan o)
 
@@ -144,7 +144,7 @@
 
 instance AffineSpace AlphaColour where
  affineCombo l z =
-   foldl1' rgbaAdd [disolve w a | (w,a) <- (1-total,z):l]
+   foldl1' rgbaAdd [dissolve w a | (w,a) <- (1-total,z):l]
   where
    total = sum $ map fst l
 
diff --git a/Tests.hs b/Tests.hs
--- a/Tests.hs
+++ b/Tests.hs
@@ -188,10 +188,10 @@
 -}
 
 prop_disolveId :: RAlphaColour -> Bool
-prop_disolveId c = disolve 1 c == c
+prop_disolveId c = dissolve 1 c == c
 
 prop_disolveTransparent :: RAlphaColour -> Bool
-prop_disolveTransparent c = disolve 0 c == transparent
+prop_disolveTransparent c = dissolve 0 c == transparent
 
 prop_transparentOver :: RColour -> Bool
 prop_transparentOver c = transparent `over` c == c
@@ -274,8 +274,8 @@
         ,("sRGB-from-to", test prop_fromToSRGB)
 --        ,("Y'CbCr-709-from-to", test prop_fromToY'CbCr709)
 --        ,("Y'CbCr-601-from-to", test prop_fromToY'CbCr601)
-        ,("disolve-id", test prop_disolveId)
-        ,("disolve-transparent", test prop_disolveTransparent)
+        ,("dissolve-id", test prop_disolveId)
+        ,("dissolve-transparent", test prop_disolveTransparent)
         ,("transparent-over", test prop_transparentOver)
         ,("over-transparent", test prop_overTransparent)
         ,("opaque-over", test prop_opaqueOver)
diff --git a/colour.cabal b/colour.cabal
--- a/colour.cabal
+++ b/colour.cabal
@@ -1,5 +1,5 @@
 Name:                colour
-Version:             1.1.0
+Version:             2.0.0
 Cabal-Version:       >= 1.2
 License:             OtherLicense
 License-file:        LICENSE