diff --git a/stm-containers.cabal b/stm-containers.cabal
--- a/stm-containers.cabal
+++ b/stm-containers.cabal
@@ -1,9 +1,6 @@
-name:
-  stm-containers
-version:
-  1.0.1
-synopsis:
-  Containers for STM
+name: stm-containers
+version: 1.0.1.1
+synopsis: Containers for STM
 description:
   This library is based on an STM-specialized implementation of
   Hash Array Mapped Trie.
@@ -14,40 +11,26 @@
   .
   For details on performance of the library, which are a bit outdated, see
   <http://nikita-volkov.github.io/stm-containers/ this blog post>.
-category:
-  Data Structures, STM, Concurrency
-homepage:
-  https://github.com/nikita-volkov/stm-containers
-bug-reports:
-  https://github.com/nikita-volkov/stm-containers/issues
-author:
-  Nikita Volkov <nikita.y.volkov@mail.ru>
-maintainer:
-  Nikita Volkov <nikita.y.volkov@mail.ru>
-copyright:
-  (c) 2014, Nikita Volkov
-license:
-  MIT
-license-file:
-  LICENSE
-build-type:
-  Simple
-cabal-version:
-  >=1.10
+category: Data Structures, STM, Concurrency
+homepage: https://github.com/nikita-volkov/stm-containers
+bug-reports: https://github.com/nikita-volkov/stm-containers/issues
+author: Nikita Volkov <nikita.y.volkov@mail.ru>
+maintainer: Nikita Volkov <nikita.y.volkov@mail.ru>
+copyright: (c) 2014, Nikita Volkov
+license: MIT
+license-file: LICENSE
+build-type: Simple
+cabal-version: >=1.10
+tested-with: GHC ==8.0.2, GHC ==8.2.2, GHC ==8.4.2, GHC ==8.6.*
 
 source-repository head
-  type:
-    git
-  location:
-    git://github.com/nikita-volkov/stm-containers.git
+  type: git
+  location: git://github.com/nikita-volkov/stm-containers.git
 
 library
-  hs-source-dirs:
-    library
-  default-extensions:
-    Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, PatternSynonyms, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples
-  default-language:
-    Haskell2010
+  hs-source-dirs: library
+  default-extensions: Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, PatternSynonyms, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples
+  default-language: Haskell2010
   exposed-modules:
     StmContainers.Map
     StmContainers.Set
@@ -56,25 +39,20 @@
   other-modules:
     StmContainers.Prelude
   build-depends:
-    base <5,
+    base >=4.9 && <5,
     deferred-folds >=0.6.6 && <0.7,
     focus >=1 && <1.1,
     hashable <2,
     list-t >=1.0.1 && <1.1,
-    stm-hamt >=1.1.2 && <1.2,
+    stm-hamt >=1.1.2.1 && <1.2,
     transformers >=0.5 && <0.6
 
 test-suite test
-  type:
-    exitcode-stdio-1.0
-  hs-source-dirs:
-    test
-  default-extensions:
-    Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, PatternSynonyms, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples
-  default-language:
-    Haskell2010
-  main-is:
-    Main.hs
+  type: exitcode-stdio-1.0
+  hs-source-dirs: test
+  default-extensions: Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, PatternSynonyms, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples
+  default-language: Haskell2010
+  main-is: Main.hs
   other-modules:
     Main.MapTests
     Main.MapTests.Update
@@ -85,5 +63,6 @@
     free >=4.6 && <6,
     HTF ==0.13.*,
     QuickCheck >=2.7 && <3,
+    quickcheck-text >=0.1.2.1 && <0.2,
     rerebase >=1 && <2,
     stm-containers
diff --git a/test/Main/MapTests.hs b/test/Main/MapTests.hs
--- a/test/Main/MapTests.hs
+++ b/test/Main/MapTests.hs
@@ -4,6 +4,7 @@
 import Prelude hiding (choose)
 import Test.Framework
 import Control.Monad.Free
+import Data.Text.Arbitrary ()
 import qualified Main.MapTests.Update as Update
 import qualified StmContainers.Map as StmMap
 import qualified Focus
@@ -54,7 +55,7 @@
 -------------------------
 
 newtype TestKey = TestKey Word8
-  deriving (Eq, Show)
+  deriving (Eq, Ord, Show)
 
 instance Arbitrary TestKey where
   arbitrary = TestKey <$> choose (0, 63)
@@ -83,24 +84,27 @@
             x <- stmMapFromList list
             StmMap.size x
 
-prop_fromUnfoldMoListIsomorphism =
-  forAll gen prop
-  where
-    gen = do
-      keys <- nub <$> listOf (arbitrary :: Gen Char)
-      mapM (liftA2 (flip (,)) (arbitrary :: Gen Int) . pure) keys
-    prop list =
-      list \\ list' === []
-      where
-        list' = unsafePerformIO $ atomically $ stmMapFromList list >>= stmMapToList
+prop_fromListToListHashMapIsomorphism =
+  withQCArgs (\a -> a {maxSuccess = 10000}) $ \ (list :: [(Text, Int)]) -> let
+    hashMapList = HashMap.toList (HashMap.fromList list)
+    stmMapList = unsafePerformIO $ atomically $ stmMapFromList list >>= stmMapToList
+    in sort hashMapList === sort stmMapList
 
 prop_updatesProduceTheSameEffectAsInHashMap =
-  withQCArgs (\a -> a {maxSuccess = 1000}) prop
+  withQCArgs (\a -> a {maxSuccess = 100000}) prop
   where
     prop (updates :: [Update.Update TestKey ()]) =
-      interpretHashMapUpdate update === interpretStmMapUpdateAsHashMap update
-      where
+      let
         update = sequence_ updates
+        hashMap = interpretHashMapUpdate update
+        hashMapSize = HashMap.size hashMap
+        hashMapList = sort (HashMap.toList hashMap)
+        (stmMapList, stmMapSize) = unsafePerformIO $ atomically $ do
+          stmMap <- interpretStmMapUpdate update
+          size <- StmMap.size stmMap
+          stmMapList <- stmMapToList stmMap
+          return (sort stmMapList, size)
+        in (hashMapSize, hashMapList) === (stmMapSize, stmMapList)
 
 test_focusInsert = do
   assertEqual (HashMap.fromList [('a', 1), ('b', 2)]) =<< do 
diff --git a/test/Main/MapTests/Update.hs b/test/Main/MapTests/Update.hs
--- a/test/Main/MapTests/Update.hs
+++ b/test/Main/MapTests/Update.hs
@@ -36,7 +36,8 @@
     where
       showsPrecInner = showsPrec (succ 5)
 
-instance Show1 (UpdateF k v)
+instance Show1 (UpdateF k v) where
+  liftShowsPrec = undefined
 
 makeFree ''UpdateF
 
