diff --git a/x-dsp.cabal b/x-dsp.cabal
--- a/x-dsp.cabal
+++ b/x-dsp.cabal
@@ -1,5 +1,5 @@
 Name:                x-dsp
-Version:             0.2.3
+Version:             0.2.3.1
 Synopsis:            A embedded DSL for manipulating DSP languages in Haskell
 Description:         Provides a tagless-final language family for manipulating
                      audio programming languages (e.g. Csound, Supercollider).
@@ -37,7 +37,7 @@
   Build-depends:     base             >= 3   && < 5
                     ,array            >= 0.2 && < 0.5
                     ,bytestring       >= 0.9 && < 0.10
-                    ,containers       >= 0.2 && < 0.5
+                    ,containers       >= 0.2 && < 0.6
                     ,monads-tf        >= 0.1 && < 0.2
                     ,text             >= 0.7 && < 0.13
                     ,transformers     >= 0.2 && < 0.4