diff --git a/music-sibelius.cabal b/music-sibelius.cabal
--- a/music-sibelius.cabal
+++ b/music-sibelius.cabal
@@ -1,11 +1,11 @@
 
 name:                   music-sibelius
-version:                1.7.1
+version:                1.7.2
 author:                 Hans Hoglund
 maintainer:             Hans Hoglund <hans@hanshoglund.se>
 license:                BSD3
 license-file:           COPYING
-synopsis:               To be written.
+synopsis:               Interaction with Sibelius.
 category:               Music
 tested-with:            GHC
 build-type:             Simple
@@ -23,14 +23,14 @@
 library                    
     build-depends:      base                    >= 4 && < 5,
                         aeson                   >= 0.7.0.6 && < 1,
-                        lens				            >= 4.3 && < 4.4,
+                        lens				            >= 4.3.3 && < 4.4,
                         semigroups              >= 0.13.0.1 && < 1,
                         monadplus,
                         unordered-containers,
                         bytestring,
-                        music-score             == 1.7.1,
-                        music-pitch-literal     == 1.7.1,
-                        music-preludes          == 1.7.1,
+                        music-score             == 1.7.2,
+                        music-pitch-literal     == 1.7.2,
+                        music-preludes          == 1.7.2,
                         aeson
     exposed-modules:    Music.Sibelius
                         Music.Score.Import.Sibelius
