diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -7,4 +7,4 @@
 This is an implementation of the *transactional trie*,
 which is basically a *lock-free concurrent hash trie* lifted into STM.
 For a detailed discussion, including an evaluation of its performance,
-see Chapter 4 of [my master's thesis](https://github.com/mcschroeder/thesis).
+see Chapter 3 of [my master's thesis](https://github.com/mcschroeder/thesis).
diff --git a/benchmarks/Bench.hs b/benchmarks/Bench.hs
--- a/benchmarks/Bench.hs
+++ b/benchmarks/Bench.hs
@@ -181,20 +181,13 @@
 
 instance (NFData a) => NFData (TVar a)
 
-hashmapPrefill :: PrefillFunc (TVar (HashMap.HashMap Key (TVar ())))
+hashmapPrefill :: PrefillFunc (TVar (HashMap.HashMap Key ()))
 hashmapPrefill ks = do
-  elems <- forM ks (\k -> newTVarIO () >>= \v -> return (k,v))
-  m <- newTVarIO $ HashMap.fromList elems
+  let m = HashMap.fromList $ zip ks $ repeat ()
   evaluate (rnf m)
-  return m
+  newTVarIO m
 
-hashmapEval :: EvalFunc (TVar (HashMap.HashMap Key (TVar ())))
-hashmapEval Lookup k m = do
-  v <- HashMap.lookup k <$> readTVar m
-  case v of
-    Just v -> void $ readTVar v
-    Nothing -> return ()
-hashmapEval Insert k m = do
-  v <- newTVar ()
-  modifyTVar' m (HashMap.insert k v)
+hashmapEval :: EvalFunc (TVar (HashMap.HashMap Key ()))
+hashmapEval Lookup k m = void $ HashMap.lookup k <$> readTVar m
+hashmapEval Insert k m = modifyTVar' m (HashMap.insert k ())
 hashmapEval Delete k m = modifyTVar' m (HashMap.delete k)
diff --git a/benchmarks/run.sh b/benchmarks/run.sh
--- a/benchmarks/run.sh
+++ b/benchmarks/run.sh
@@ -13,11 +13,11 @@
     bench $THREADS $NUM_TX "[(1,1)]" $NUM_TX "(0,0,0,1)" "results/1/delete"
 
     mkdir -p "results/5"
-    bench $THREADS $NUM_TX $TX_SIZE 0            "(70,10,10,10)" "results/update/5/insert"
-    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,70,10,10)" "results/update/5/update"
-    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,10,70,10)" "results/update/5/lookup"
-    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,10,10,70)" "results/update/5/delete"    
-    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(25,25,25,25)" "results/update/5/balanced-prefill"
+    bench $THREADS $NUM_TX $TX_SIZE 0            "(70,10,10,10)" "results/5/insert"
+    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,70,10,10)" "results/5/update"
+    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,10,70,10)" "results/5/lookup"
+    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(10,10,10,70)" "results/5/delete"
+    bench $THREADS $NUM_TX $TX_SIZE $NUM_PREFILL "(25,25,25,25)" "results/5/balanced"
 
 #    sudo shutdown -h now
 }
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+# 0.1.2.1 (November 2015)
+	* Eliminate a redundant import warning on GHC 7.10
+	* Loosen test-suite dependency bounds
+
 # 0.1.2  (May 2015)
     * Add a 'member' convenience function
 
diff --git a/src/Control/Concurrent/STM/Map.hs b/src/Control/Concurrent/STM/Map.hs
--- a/src/Control/Concurrent/STM/Map.hs
+++ b/src/Control/Concurrent/STM/Map.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE PatternGuards #-}
 {-# OPTIONS_GHC -funbox-strict-fields #-}
 
@@ -29,7 +30,9 @@
     , unsafeToList
     ) where
 
+#if __GLASGOW_HASKELL__ < 710
 import Control.Applicative ((<$>))
+#endif
 import Control.Concurrent.STM
 import Control.Monad
 import Data.Atomics
diff --git a/ttrie.cabal b/ttrie.cabal
--- a/ttrie.cabal
+++ b/ttrie.cabal
@@ -1,5 +1,5 @@
 name:                ttrie
-version:             0.1.2
+version:             0.1.2.1
 synopsis:            Contention-free STM hash map
 description:
   A contention-free STM hash map.
@@ -35,7 +35,7 @@
   other-modules:       Data.SparseArray
   default-language:    Haskell2010
   ghc-options:         -Wall
-  build-depends:       base >=4.7 && <4.8
+  build-depends:       base >=4.7 && <5
                      , atomic-primops >=0.6
                      , hashable >=1.2
                      , primitive >=0.5
@@ -48,9 +48,9 @@
 
   build-depends:
       base
-    , QuickCheck ==2.5.*
-    , test-framework ==0.8.*
-    , test-framework-quickcheck2 ==0.3.*
+    , QuickCheck >=2.5
+    , test-framework >=0.8
+    , test-framework-quickcheck2 >=0.3
     , containers >=0.5
     , hashable >=1.2
     , stm