diff --git a/musicxml2.cabal b/musicxml2.cabal
--- a/musicxml2.cabal
+++ b/musicxml2.cabal
@@ -1,6 +1,6 @@
 
 name:                   musicxml2
-version:                1.8
+version:                1.8.1
 synopsis:               A representation of the MusicXML format.
 author:                 Hans Hoglund
 maintainer:             Hans Hoglund
@@ -26,8 +26,8 @@
                         type-unary              >= 0.2.16 && < 1.0,
                         reverse-apply,
                         xml,
-                        music-pitch-literal     == 1.8,
-                        music-dynamics-literal  == 1.8
+                        music-pitch-literal     == 1.8.1,
+                        music-dynamics-literal  == 1.8.1
     exposed-modules:    Music.MusicXml
                         Music.MusicXml.Time
                         Music.MusicXml.Pitch