diff --git a/asciidiagram.cabal b/asciidiagram.cabal
--- a/asciidiagram.cabal
+++ b/asciidiagram.cabal
@@ -1,7 +1,7 @@
 -- Initial hitaa.cabal generated by cabal init.  For further documentation,
 --  see http://haskell.org/cabal/users-guide/
 name:                asciidiagram
-version:             1.1.1.1
+version:             1.2
 synopsis:            Pretty rendering of Ascii diagram into svg or png.
 description:         
     Asciidiagram Ascii art diagram like this:
@@ -40,7 +40,7 @@
 Source-Repository this
     Type:      git
     Location:  git://github.com/Twinside/asciidiagram.git
-    Tag:       v1.1.1.1
+    Tag:       v1.2
 
 library
   ghc-options: -O2 -Wall
@@ -62,8 +62,8 @@
                , containers >= 0.5
                , mtl        >= 2.1 && < 2.3
                , lens       >= 4.6 && < 5.0
-               , svg-tree       >= 0.3 && < 0.4
-               , rasterific-svg >= 0.2.3 && < 0.3
+               , svg-tree       >= 0.4.1 && < 0.5
+               , rasterific-svg >= 0.3 && < 0.4
                , FontyFruity    >= 0.5 && < 0.6
                , JuicyPixels    >= 3.2
 
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,6 +1,12 @@
 Change log
 ==========
 
+v1.2 February 2016
+------------------
+ * Breaking change: DPI parameter on the rendering functions
+ * Fix: exposing grid size
+ * Fix: Bumped dependencies
+
 v1.1.1.1 May 2015
 -----------------
 
diff --git a/exec-src/asciidiagram.hs b/exec-src/asciidiagram.hs
--- a/exec-src/asciidiagram.hs
+++ b/exec-src/asciidiagram.hs
@@ -112,13 +112,13 @@
     savePdf diag = do
       cache <- getFontCache  $ _verbose opt
       verbose . putStrLn $ "Writing PDF file " ++ _outputFile opt
-      pdf <- pdfOfDiagram cache 96 diag
+      pdf <- pdfOfDiagram cache diag
       LB.writeFile (savingPath "pdf") pdf
 
     savePng diag = do
       cache <- getFontCache  $ _verbose opt
       verbose . putStrLn $ "Writing PNG file " ++ _outputFile opt
-      img <- imageOfDiagram cache 96 diag
+      img <- imageOfDiagram cache diag
       writePng (savingPath "png") img
 
 main :: IO ()
diff --git a/src/Text/AsciiDiagram.hs b/src/Text/AsciiDiagram.hs
--- a/src/Text/AsciiDiagram.hs
+++ b/src/Text/AsciiDiagram.hs
@@ -62,6 +62,15 @@
   , imageOfDiagram
   , pdfOfDiagram
 
+   -- * Customized rendering
+  , svgOfDiagramAtSize 
+  , GridSize( .. )
+  , defaultGridSize
+  , saveAsciiDiagramAsSvgAtSize
+  , imageOfDiagramAtSize
+  , pdfOfDiagramAtSize
+
+
     -- * Document description
   , Diagram( .. ) 
   , TextZone( .. )
@@ -100,7 +109,7 @@
 
 import Codec.Picture( Image, PixelRGBA8 )
 import Graphics.Text.TrueType( FontCache )
-import Graphics.Svg( Dpi, saveXmlFile )
+import Graphics.Svg( saveXmlFile )
 import Graphics.Rasterific.Svg( renderSvgDocument, pdfOfSvgDocument )
 
 {-import Debug.Trace-}
@@ -266,18 +275,37 @@
 saveAsciiDiagramAsSvg fileName diagram =
   saveXmlFile fileName $ svgOfDiagram diagram
 
--- | Render a Diagram as an image. a good value for the Dpi
+-- | Helper function helping you save a diagram as
+-- a SVG file on disk with a customized grid size.
+saveAsciiDiagramAsSvgAtSize :: FilePath -> GridSize -> Diagram -> IO ()
+saveAsciiDiagramAsSvgAtSize fileName gridSize =
+  saveXmlFile fileName . svgOfDiagramAtSize gridSize
+
+-- | Render a Diagram as an image. The Dpi
 -- is 96. The IO dependency is there to allow loading of the
 -- font files used in the document.
-imageOfDiagram :: FontCache -> Dpi -> Diagram -> IO (Image PixelRGBA8)
-imageOfDiagram cache dpi = 
-  fmap fst . renderSvgDocument cache Nothing dpi . svgOfDiagram
+imageOfDiagram :: FontCache -> Diagram -> IO (Image PixelRGBA8)
+imageOfDiagram cache = 
+  fmap fst . renderSvgDocument cache Nothing 96 . svgOfDiagram
 
+-- | Render a Diagram as an image with a custom grid size. The Dpi
+-- is 96. The IO dependency is there to allow loading of the
+-- font files used in the document.
+imageOfDiagramAtSize :: FontCache -> GridSize -> Diagram -> IO (Image PixelRGBA8)
+imageOfDiagramAtSize cache gridSize =
+  fmap fst . renderSvgDocument cache Nothing 96 . svgOfDiagramAtSize gridSize
+
 -- | Render a Diagram into a PDF file. IO dependency to allow
 -- loading of the font files used in the document.
-pdfOfDiagram :: FontCache -> Dpi -> Diagram -> IO LB.ByteString
-pdfOfDiagram cache dpi =
-  fmap fst . pdfOfSvgDocument cache Nothing dpi . svgOfDiagram
+pdfOfDiagram :: FontCache -> Diagram -> IO LB.ByteString
+pdfOfDiagram cache =
+  fmap fst . pdfOfSvgDocument cache Nothing 96 . svgOfDiagram
+
+-- | Render a Diagram into a PDF file with a custom grid size.
+-- IO dependency to allow loading of the font files used in the document.
+pdfOfDiagramAtSize :: FontCache -> GridSize -> Diagram -> IO LB.ByteString
+pdfOfDiagramAtSize cache size =
+  fmap fst . pdfOfSvgDocument cache Nothing 96 . svgOfDiagramAtSize size
 
 -- $linesdoc
 -- The basic syntax of asciidiagrams is made of lines made out\nof \'-\' and \'|\' characters. They can be connected with anchors\nlike \'+\' (direct connection) or \'\\\' and \'\/\' (smooth connections)\n
diff --git a/src/Text/AsciiDiagram/SvgRender.hs b/src/Text/AsciiDiagram/SvgRender.hs
--- a/src/Text/AsciiDiagram/SvgRender.hs
+++ b/src/Text/AsciiDiagram/SvgRender.hs
@@ -1,6 +1,10 @@
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
-module Text.AsciiDiagram.SvgRender( svgOfDiagram ) where
+module Text.AsciiDiagram.SvgRender( GridSize( .. )
+                                  , defaultGridSize
+                                  , svgOfDiagram
+                                  , svgOfDiagramAtSize
+                                  ) where
 
 #if !MIN_VERSION_base(4,8,0)
 import Data.Monoid( mempty )
@@ -38,13 +42,24 @@
 {-import Debug.Trace-}
 {-import Text.Groom-}
 
+-- | Simple type describing the grid size used during render.
 data GridSize = GridSize
-  { _gridCellWidth        :: !Float
-  , _gridCellHeight       :: !Float
+  { _gridCellWidth        :: !Float -- ^ Width of a cell (in pixel)
+  , _gridCellHeight       :: !Float -- ^ Height of a cell (in pixel)
+
+    -- | Coefficient used to space adjacent shapes, set to 0
+    -- if you want to remove space between them.
   , _gridShapeContraction :: !Float
   }
   deriving (Eq, Show)
 
+-- | Default grid size used in the simple render functions
+defaultGridSize :: GridSize
+defaultGridSize = GridSize
+  { _gridCellWidth = 10
+  , _gridCellHeight = 14
+  , _gridShapeContraction = 1.5
+  }
 
 toSvg :: GridSize -> Point -> Svg.RPoint
 toSvg s (V2 x y) =
@@ -457,7 +472,13 @@
 -- | Transform an Ascii diagram to a SVG document which
 -- can be saved or converted to an image.
 svgOfDiagram :: Diagram -> Svg.Document
-svgOfDiagram diagram = Document
+svgOfDiagram = svgOfDiagramAtSize defaultGridSize where
+
+-- | Transform an Ascii diagram to a SVG document which
+-- can be saved or converted to an image, with a customizable
+-- grid size.
+svgOfDiagramAtSize :: GridSize -> Diagram -> Svg.Document
+svgOfDiagramAtSize scale diagram = Document
   { _viewBox = Nothing
   , _width =
       toSvgSize _gridCellWidth $ _diagramCellWidth diagram + 1
@@ -493,9 +514,4 @@
     textSvg = textToTree scale <$> _diagramTexts diagram
 
     strokeScale = scale { _gridShapeContraction = 0 }
-    scale = GridSize
-      { _gridCellWidth = 10
-      , _gridCellHeight = 14
-      , _gridShapeContraction = 1.5
-      }