diff --git a/validity-containers.cabal b/validity-containers.cabal
--- a/validity-containers.cabal
+++ b/validity-containers.cabal
@@ -1,18 +1,19 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 3d157ef5a3aebc5270b999367df6f891824ab48a7a703ab515e3e1320d943aa9
+-- hash: 77cb2b975040064ad6346e213a7a6f93161985fcb67d7b8949aa00fcd8f9617d
 
 name:           validity-containers
-version:        0.3.0.1
+version:        0.3.1.0
 synopsis:       Validity instances for containers
 description:    Please see README.md
 category:       Validity
 homepage:       https://github.com/NorfairKing/validity#readme
 bug-reports:    https://github.com/NorfairKing/validity/issues
 author:         Tom Sydney Kerckhove
-maintainer:     syd.kerckhove@gmail.com
+maintainer:     syd.kerckhove@gmail.com,
+                nick.van.den.broeck666@gmail.com
 copyright:      Copyright: (c) 2016-2018 Tom Sydney Kerckhove
 license:        MIT
 license-file:   LICENSE