diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,8 @@
+# 1.7.0
+
++ Test with GHC 8.2. Drop GHC 7.8.
++ Rework `allUniqueValues` related utility functions.
+
 # 1.6.3
 
 + Bump hjsonpointer and QuickCheck.
diff --git a/hjsonschema.cabal b/hjsonschema.cabal
--- a/hjsonschema.cabal
+++ b/hjsonschema.cabal
@@ -1,5 +1,5 @@
 name:               hjsonschema
-version:            1.6.3
+version:            1.7.0
 synopsis:           JSON Schema library
 homepage:           https://github.com/seagreen/hjsonschema
 license:            MIT
@@ -9,7 +9,8 @@
 category:           Data
 build-type:         Simple
 cabal-version:      >=1.10
-tested-with:        GHC == 7.8.4, GHC == 7.10.2, GHC == 8.0.1
+-- Rerun multi-ghc-travis (executable make-travis-yml-2) after changing:
+Tested-With:        GHC == 7.10.3, GHC == 8.0.2, GHC == 8.2.1
 extra-source-files:
   changelog.md
   JSON-Schema-Test-Suite/remotes/*.json
@@ -58,7 +59,7 @@
       JSONSchema.Validator.Draft4.Object.Properties
     , Import
   build-depends:
-      base                 >= 4.7    && < 4.10
+      base                 >= 4.7    && < 4.11
     -- 0.11 is for `.:!`:
     , aeson                >= 0.11   && < 1.3
     , bytestring           >= 0.10   && < 0.11
@@ -66,7 +67,7 @@
     , file-embed           >= 0.0.8  && < 0.1
     , filepath             >= 1.3    && < 1.5
     , hashable             >= 1.2    && < 1.3
-    , hjsonpointer         >= 1.1    && < 1.3
+    , hjsonpointer         >= 1.1    && < 1.4
     -- 0.4.30 is for parseUrlThrow:
     , http-client          >= 0.4.30 && < 0.6
     , http-types           >= 0.8    && < 0.10
@@ -161,7 +162,3 @@
     , hspec
     , wai-app-static
     , warp
-
-source-repository head
-  type: git
-  location: git://github.com/seagreen/hjsonschema.git
diff --git a/src/Import.hs b/src/Import.hs
--- a/src/Import.hs
+++ b/src/Import.hs
@@ -5,7 +5,6 @@
 
 import           Data.Aeson          as Export
 import           Data.HashMap.Strict as Export (HashMap)
-import           Data.List           as Export (length, null) -- for older GHCs
 import           Data.List.NonEmpty  as Export (NonEmpty)
 import           Data.Vector         as Export (Vector)
 import           Test.QuickCheck     as Export hiding ((.&.), Failure,
diff --git a/src/JSONSchema/Validator/Draft4/Any.hs b/src/JSONSchema/Validator/Draft4/Any.hs
--- a/src/JSONSchema/Validator/Draft4/Any.hs
+++ b/src/JSONSchema/Validator/Draft4/Any.hs
@@ -216,9 +216,9 @@
 
 enumVal :: EnumValidator -> Value -> Maybe EnumInvalid
 enumVal a@(EnumValidator vs) x
-    | not (UT.allUniqueValues' vs) = Nothing
-    | x `elem` vs                  = Nothing
-    | otherwise                    = Just $ EnumInvalid a x
+    | not (UT.allUniqueValues vs) = Nothing
+    | x `elem` vs                 = Nothing
+    | otherwise                   = Just $ EnumInvalid a x
 
 --------------------------------------------------
 -- * type
@@ -377,8 +377,7 @@
     -> Value
     -> Maybe (AnyOfInvalid err)
 anyOfVal f (AnyOf subSchemas) x
-    -- Replace with @null@ once we drop GHC 7.8:
-    | any (((==) 0 . length) . snd) perhapsFailures = Nothing
+    | any (null . snd) perhapsFailures = Nothing
     | otherwise = AnyOfInvalid <$> NE.nonEmpty failures
   where
     perhapsFailures :: [(JP.Index, [err])]
diff --git a/src/JSONSchema/Validator/Draft4/Object.hs b/src/JSONSchema/Validator/Draft4/Object.hs
--- a/src/JSONSchema/Validator/Draft4/Object.hs
+++ b/src/JSONSchema/Validator/Draft4/Object.hs
@@ -96,9 +96,6 @@
 
 requiredVal :: Required -> HashMap Text Value -> Maybe RequiredInvalid
 requiredVal r@(Required ts) x
-    -- NOTE: When we no longer need to support GHCs before 7.10
-    -- we can use null from Prelude throughout the library
-    -- instead of specialized versions.
     | Set.null ts        = Nothing
     | Set.null leftovers = Nothing
     | otherwise          = Just (RequiredInvalid r leftovers x)
diff --git a/src/JSONSchema/Validator/Utils.hs b/src/JSONSchema/Validator/Utils.hs
--- a/src/JSONSchema/Validator/Utils.hs
+++ b/src/JSONSchema/Validator/Utils.hs
@@ -83,16 +83,11 @@
 -- * allUniqueValues
 --------------------------------------------------
 
-allUniqueValues :: Vector Value -> Bool
-allUniqueValues = allUnique . fmap OrdValue . V.toList
-
--- NOTE: When we no longer support GHC 7.8 we can generalize
--- allUnique to work on any Foldable and remove this function.
-allUniqueValues' :: NonEmpty Value -> Bool
-allUniqueValues' = allUnique . fmap OrdValue . NE.toList
+allUniqueValues :: (Foldable f, Functor f) => f Value -> Bool
+allUniqueValues = allUnique . fmap OrdValue
 
-allUnique :: (Ord a) => [a] -> Bool
-allUnique xs = S.size (S.fromList xs) == length xs
+allUnique :: (Foldable f, Ord a) => f a -> Bool
+allUnique xs = S.size (S.fromList (toList xs)) == length xs
 
 -- | OrdValue's Ord instance needs benchmarking, but it allows us to
 -- use our 'allUnique' function instead of O(n^2) nub, so it's probably
diff --git a/test/Local/Validation.hs b/test/Local/Validation.hs
--- a/test/Local/Validation.hs
+++ b/test/Local/Validation.hs
@@ -1,7 +1,7 @@
 
 module Local.Validation where
 
-import           Protolude           hiding (msg)
+import           Protolude
 
 import           Data.Aeson
 import qualified Data.Aeson          as AE