diff --git a/src/Data/Validity/HashMap.hs b/src/Data/Validity/HashMap.hs
--- a/src/Data/Validity/HashMap.hs
+++ b/src/Data/Validity/HashMap.hs
@@ -6,11 +6,10 @@
 
 import Data.HashMap.Strict (HashMap)
 import qualified Data.HashMap.Strict as HM
-import Data.Hashable (Hashable)
 
 -- | A 'HashMap' of things is valid if all the keys and values are valid.
 --
 -- The 'unordered-containers' package does not export any more functionality
 -- concerning a 'HashMap', so no more accurate validity instance can be made.
-instance (Hashable k, Validity k, Validity v) => Validity (HashMap k v) where
+instance (Validity k, Validity v) => Validity (HashMap k v) where
     validate = delve "HashMap elements" . HM.toList
diff --git a/src/Data/Validity/HashSet.hs b/src/Data/Validity/HashSet.hs
--- a/src/Data/Validity/HashSet.hs
+++ b/src/Data/Validity/HashSet.hs
@@ -7,9 +7,8 @@
 
 import Data.HashSet (HashSet)
 import qualified Data.HashSet as HS
-import Data.Hashable (Hashable)
 
 -- | A 'HashSet' of things is valid if all the elements are valid and
 -- the underlying 'HashMap' is valid.
-instance (Hashable v, Validity v) => Validity (HashSet v) where
+instance Validity v => Validity (HashSet v) where
     validate = delve "HashSet elements" . HS.toMap
diff --git a/validity-unordered-containers.cabal b/validity-unordered-containers.cabal
--- a/validity-unordered-containers.cabal
+++ b/validity-unordered-containers.cabal
@@ -1,29 +1,37 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+cabal-version: >= 1.10
+
+-- This file has been generated from package.yaml by hpack version 0.29.6.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: a61af46fc66f4d70b5507a828f9600b15e8e9ce7cda2c2318e8488e296ee8a28
+-- hash: 349b65e7bc5679c457cec04f3cea36e49a8da271ec3af7cfa5c25c3f368be256
 
 name:           validity-unordered-containers
-version:        0.2.0.1
+version:        0.2.0.2
 synopsis:       Validity instances for unordered-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) 2017-2018 Tom Sydney Kerckhove
 license:        MIT
 license-file:   LICENSE
 build-type:     Simple
-cabal-version:  >= 1.10
 
 source-repository head
   type: git
   location: https://github.com/NorfairKing/validity
 
 library
+  exposed-modules:
+      Data.Validity.UnorderedContainers
+      Data.Validity.HashMap
+      Data.Validity.HashSet
+  other-modules:
+      Paths_validity_unordered_containers
   hs-source-dirs:
       src
   build-depends:
@@ -31,10 +39,4 @@
     , hashable
     , unordered-containers >=0.2.7
     , validity >=0.5
-  exposed-modules:
-      Data.Validity.UnorderedContainers
-      Data.Validity.HashMap
-      Data.Validity.HashSet
-  other-modules:
-      Paths_validity_unordered_containers
   default-language: Haskell2010