diff --git a/gruff.cabal b/gruff.cabal
--- a/gruff.cabal
+++ b/gruff.cabal
@@ -1,5 +1,5 @@
 Name:                gruff
-Version:             0.3.1
+Version:             0.3.3
 Synopsis:            fractal explorer GUI using the ruff library
 Description:
     Mandelbrot Set fractal explorer using the ruff library.
@@ -13,6 +13,8 @@
     @cabal install gruff -fmpfr@.
     Note that the default setting for this flag has changed since gruff-0.2.
     .
+    gruff-0.3.3 relaxes dependencies for ghc-7.6.
+    .
     gruff-0.3.1 is a bugfix release, fixing a performance problem wherein
     offscreen tiles were needlessly calculated.  The performance gain
     is much less (and in many cases is in fact a performance loss) when
@@ -90,7 +92,7 @@
   Hs-source-dirs:     src
   Exposed-modules:    Fractal.GRUFF
   Build-depends:      base >= 3 && < 5,
-                      ruff >= 0.3 && < 0.4
+                      ruff >= 0.3.2 && < 0.4
   GHC-options:        -Wall
 
 Executable gruff
@@ -109,8 +111,8 @@
                       Tile
                       Utils
                       View
-  Build-depends:      gruff == 0.3.1,
-                      base >= 4 && < 5,
+  Build-depends:      gruff == 0.3.3,
+                      base >= 4 && < 6,
                       containers >= 0 && < 1,
                       directory >= 1 && < 2,
                       filepath >= 1 && < 2,
@@ -120,12 +122,12 @@
                       old-locale >= 1 && < 2,
                       OpenGL >= 2.4 && < 3,
                       OpenGLRaw >= 1.1 && < 2,
-                      parallel >= 3.1 && < 3.2,
+                      parallel >= 3.1 && < 3.3,
                       qd >= 1 && < 2,
                       qd-vec >= 1 && < 2,
                       time >= 1 && < 2,
-                      Vec >= 0.9 && < 1,
-                      ruff >= 0.3 && < 0.4,
+                      Vec >= 0.9 && < 2,
+                      ruff >= 0.3.2 && < 0.4,
                       bytestring,
                       mtl
   if (flag(mpfr))
@@ -144,4 +146,4 @@
 source-repository this
   type:     git
   location: git://gitorious.org/ruff/gruff.git
-  tag:      v0.3.1
+  tag:      v0.3.3
diff --git a/src/Tile.hs b/src/Tile.hs
--- a/src/Tile.hs
+++ b/src/Tile.hs
@@ -7,7 +7,7 @@
 import Control.Monad (when)
 import Data.Bits (shiftL, shiftR, (.&.))
 import Foreign (Ptr, castPtr, sizeOf, mallocArray, free, Word8, with, poke, allocaBytes, withArray, peekArray)
-import Foreign.C (CFloat, CDouble, CInt, CSize, withCStringLen)
+import Foreign.C (CFloat(..), CDouble(..), CInt(..), CSize(..), withCStringLen)
 import System.Directory (createDirectoryIfMissing)
 import System.FilePath ((</>), (<.>))
 import System.IO (withBinaryFile, IOMode(ReadMode,WriteMode), hPutBuf, hGetBuf)