diff --git a/ltk.cabal b/ltk.cabal
--- a/ltk.cabal
+++ b/ltk.cabal
@@ -1,5 +1,5 @@
 name: ltk
-version: 0.12.0.0
+version: 0.12.1.0
 cabal-version: >= 1.8
 build-type: Simple
 license: GPL
@@ -19,8 +19,9 @@
     build-depends: Cabal >=1.6.0 && <1.15, base >=4.0.0.0 && <4.6,
                containers >=0.2 && <0.5, filepath >=1.1.0 && <1.4,
                glib >=0.10.0 && <0.13, gtk >=0.10.0 && <0.13,
-               mtl >=1.1.0.2 && <2.1, parsec >=2.1.0.1 && <3.2,
-               pretty >=1.0.1.0 && <1.2, transformers >=0.2.2.0 && <0.3
+               mtl >=1.1.0.2 && <2.2, parsec >=2.1.0.1 && <3.2,
+               pretty >=1.0.1.0 && <1.2, transformers >=0.2.2.0 && <0.4,
+               ghc -any
 
     exposed-modules: Default MyMissing Control.Event
                  Graphics.UI.Editor.Basics Graphics.UI.Editor.Composite