diff --git a/musicw.cabal b/musicw.cabal
--- a/musicw.cabal
+++ b/musicw.cabal
@@ -1,5 +1,5 @@
 name:                musicw
-version:             0.3.9
+version:             0.3.10
 synopsis:            Sound synthesis library, to be used with GHCJS and Web Audio API
 description:         A library for sound synthesis, currently targeting GHCJS and the Web Audio API. Used by Inner Ear, Estuary, Punctual and possibly other projects.
 homepage:            https://github.com/dktr0/musicw/blob/master/README.md
@@ -31,7 +31,6 @@
       file-embed >= 0.0.10.1 && < 0.1,
       time >= 1.8.0.2 && < 1.9,
       monad-loops >= 0.4.3 && < 0.5,
-      json >= 0.9.2 && < 0.10,
       bytestring >= 0.10.8.2 && < 0.11,
       mtl >= 2.2.2 && < 2.3
   GHC-Options:     -Wall -fwarn-tabs