diff --git a/music-sibelius.cabal b/music-sibelius.cabal
--- a/music-sibelius.cabal
+++ b/music-sibelius.cabal
@@ -1,39 +1,38 @@
 
-name:               music-sibelius
-version:            1.6
-cabal-version:      >= 1.10
-author:             Hans Hoglund
-maintainer:         Hans Hoglund <hans@hanshoglund.se>
-license:            BSD3
-license-file:       COPYING
-synopsis:           To be written.
-category:           Music
-tested-with:        GHC
-build-type:         Simple
+name:                   music-sibelius
+version:                1.6.1
+author:                 Hans Hoglund
+maintainer:             Hans Hoglund <hans@hanshoglund.se>
+license:                BSD3
+license-file:           COPYING
+synopsis:               To be written.
+category:               Music
+tested-with:            GHC
+build-type:             Simple
+cabal-version:          >= 1.10
 
 description: 
     Import music from Sibelius (experimental).
-    
+    .
     This library is part of the Music Suite, see <http://music-suite.github.io>.
 
 source-repository head
-  type:             git
-  location:         git://github.com/music-suite/music-sibelius.git
+  type:                 git
+  location:             git://github.com/music-suite/music-sibelius.git
   
 library                    
-    build-depends: 
-        base                     >= 4 && < 5,
-        semigroups,
-        monadplus,
-        unordered-containers,
-        bytestring,
-        music-score              == 1.6,
-        music-pitch-literal      == 1.6,
-        music-preludes           == 1.6,
-        aeson
-    hs-source-dirs: src
-    default-language: Haskell2010
-    exposed-modules:
-        Music.Sibelius
-        Music.Score.Import.Sibelius
+    build-depends:      base                     >= 4 && < 5,
+                        semigroups,
+                        lens				     >= 4.0 && < 4.1,
+                        monadplus,
+                        unordered-containers,
+                        bytestring,
+                        music-score              == 1.6,
+                        music-pitch-literal      == 1.6,
+                        music-preludes           == 1.6,
+                        aeson
+    exposed-modules:    Music.Sibelius
+                        Music.Score.Import.Sibelius
+    hs-source-dirs:     src
+    default-language:   Haskell2010