diff --git a/ltk.cabal b/ltk.cabal
--- a/ltk.cabal
+++ b/ltk.cabal
@@ -1,5 +1,5 @@
 name: ltk
-version: 0.14.3.0
+version: 0.15.0.0
 cabal-version: >= 1.8
 build-type: Simple
 license: GPL
@@ -24,8 +24,8 @@
     default: True
 
 Library
-    build-depends: Cabal >=1.6.0 && <1.21, base >=4.0.0.0 && <4.8,
-               containers >=0.2 && <0.6, filepath >=1.1.0 && <1.4,
+    build-depends: Cabal >=1.6.0 && <1.23, base >=4.0.0.0 && <4.9,
+               containers >=0.2 && <0.6, filepath >=1.1.0 && <1.5,
                glib >=0.13.0.0 && <0.14, text >=0.11.0.6 && <1.3,
                mtl >=1.1.0.2 && <2.3, parsec >=2.1.0.1 && <3.2,
                pretty >=1.0.1.0 && <1.2, transformers >=0.2.2.0 && <0.5,