diff --git a/picosat.cabal b/picosat.cabal
--- a/picosat.cabal
+++ b/picosat.cabal
@@ -1,12 +1,12 @@
 name:                picosat
-version:             0.1.4
+version:             0.1.5
 synopsis:            Bindings to the PicoSAT solver
 homepage:            https://github.com/sdiehl/haskell-picosat
 license:             MIT
 license-file:        LICENSE
 author:              Stephen Diehl
 maintainer:          stephen.m.diehl@gmail.com
-copyright:           2014-2017 Stephen Diehl
+copyright:           2014-2019 Stephen Diehl
 Category:            Logic
 build-type:          Simple
 cabal-version:       >=1.10
@@ -42,7 +42,7 @@
   build-depends:      
     base             >=4.6 && <5.0,
     transformers     >=0.4 && <0.6,
-    containers       >=0.4 && <0.6
+    containers       >=0.4 && <0.7
   default-language:   Haskell2010
   Hs-source-dirs:     src
   Include-dirs:       cbits