diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [v1.4.1](https://github.com/diagrams/diagrams-svg/tree/v1.4.1) (2016-10-26)
+
+- Handle wider range of font weight specifications
+- allow `lens-4.15`
+
 ## [v1.4.0.4](https://github.com/diagrams/diagrams-svg/tree/v1.4.0.4) (2016-08-22)
 
 - Require `optparse-applicative-0.13`, and fix compilation error
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,14 +1,22 @@
-Copyright 2011-2014 diagrams-svg team:
+Copyright 2011-2016 diagrams-svg team:
 
   Doug Beardsley <mightybyte@gmail.com>
   Daniel Bergey <bergey@alum.mit.edu>
   Jan Bracker <jan.bracker@googlemail.com>
   Christopher Chalmers <c.chalmers@me.com>
+  Michael Chavinda <mchavinda@colgate.edu>
+  Tad Doxsee <doxsee@pacbell.net>
   Daniil Frumin <difrumin@gmail.com>
+  Ben Gamari <bgamari.foss@gmail.com>
+  Gabor Greif <ggreif@gmail.com>
   Deepak Jois <deepak.jois@gmail.com>
+  Sidharth Kapur <sidharthkapur1@gmail.com>
+  Taru Karttunen <taruti@taruti.net>
   Felipe Lessa <felipe.lessa@gmail.com>
+  Andrew Martin <andrew.thaddeus@gmail.com>
   Chris Mears <chris@cmears.id.au>
   Jeffrey Rosenbluth <Jeffrey.Rosenbluth@gmail.com>
+  Ryan Scott <ryan.gl.scott@ku.edu>
   Michael Sloan <mgsloan@gmail.com>
   Michael Thompson <what_is_it_to_do_anything@yahoo.com>
   Ryan Yates <fryguybob@gmail.com>
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-diagrams-svg [![Hackage](https://img.shields.io/hackage/v/diagrams-svg.svg?style=flat)](https://hackage.haskell.org/package/diagrams-svg) [![Build Status](https://travis-ci.org/diagrams/diagrams-svg.png?branch=master)](http://travis-ci.org/diagrams/diagrams-svg)
+diagrams-svg [![Hackage](https://img.shields.io/hackage/v/diagrams-svg.svg?style=flat)](https://hackage.haskell.org/package/diagrams-svg) [![Build Status](https://travis-ci.org/diagrams/diagrams-svg.svg?branch=master)](http://travis-ci.org/diagrams/diagrams-svg)
 ------------
 
 
diff --git a/diagrams-svg.cabal b/diagrams-svg.cabal
--- a/diagrams-svg.cabal
+++ b/diagrams-svg.cabal
@@ -1,5 +1,5 @@
 Name:                diagrams-svg
-Version:             1.4.0.4
+Version:             1.4.1
 Synopsis:            SVG backend for diagrams drawing EDSL.
 Homepage:            http://projects.haskell.org/diagrams/
 License:             BSD3
@@ -12,7 +12,7 @@
 Category:            Graphics
 Build-type:          Simple
 Cabal-version:       >=1.10
-Tested-with:         GHC == 7.4.2, GHC == 7.6.3, GHC == 7.8.4, GHC == 7.10.1
+Tested-with:         GHC == 7.6.3, GHC == 7.8.4, GHC == 7.10.2, GHC == 8.0.1
 Description:         This package provides a modular backend for rendering
                      diagrams created with the diagrams EDSL to SVG
                      files.  It uses @lucid-svg@ to be a native
@@ -41,24 +41,20 @@
   Other-modules:       Graphics.Rendering.SVG
   Hs-source-dirs:      src
   Build-depends:       base                 >= 4.3   && < 4.10
-                     , old-time
-                     , process
-                     , directory
                      , filepath
                      , mtl                  >= 1     && < 2.3
                      , bytestring           >= 0.9   && < 1.0
                      , base64-bytestring    >= 1     && < 1.1
                      , colour
-                     , diagrams-core        >= 1.3   && < 1.4
-                     , diagrams-lib         >= 1.3   && < 1.4
+                     , diagrams-core        >= 1.4   && < 1.5
+                     , diagrams-lib         >= 1.4   && < 1.5
                      , monoid-extras        >= 0.3   && < 0.5
                      , svg-builder          >= 0.1   && < 0.2
                      , text                 >= 0.11  && < 1.3
                      , JuicyPixels          >= 3.1.5 && < 3.3
                      , split                >= 0.1.2 && < 0.3
-                     , time
                      , containers           >= 0.3   && < 0.6
-                     , lens                 >= 4.0   && < 4.15
+                     , lens                 >= 4.0   && < 4.16
                      , hashable             >= 1.1   && < 1.3
                      , optparse-applicative >= 0.13  && < 0.14
                      , semigroups           >= 0.13  && < 0.19
diff --git a/src/Graphics/Rendering/SVG.hs b/src/Graphics/Rendering/SVG.hs
--- a/src/Graphics/Rendering/SVG.hs
+++ b/src/Graphics/Rendering/SVG.hs
@@ -367,6 +367,15 @@
   fontWeightAttr :: FontWeight -> AttributeValue
   fontWeightAttr FontWeightNormal = "normal"
   fontWeightAttr FontWeightBold   = "bold"
+  fontWeightAttr FontWeightLighter = "lighter"
+  fontWeightAttr FontWeightBolder  = "bolder"
+  fontWeightAttr FontWeightThin = "100"
+  fontWeightAttr FontWeightUltraLight = "200"
+  fontWeightAttr FontWeightLight = "300"
+  fontWeightAttr FontWeightMedium = "400"
+  fontWeightAttr FontWeightSemiBold = "600"
+  fontWeightAttr FontWeightUltraBold = "800"
+  fontWeightAttr FontWeightHeavy = "900"
 
 
 renderFontFamily :: Style v n -> [Attribute]