diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,12 @@
 # Revision history for fold-debounce
 
+## 0.2.0.1  -- 2016-05-02
+
+* Loosen dependency on `data-default` to `data-default-class`.
+* Supports `time-1.6` and `hspec-2.2.3`.
+* Fix test error in Mac OS X.
+
+
 ## 0.2.0.0  -- 2015-06-01
 
 * The debounce period now starts from the time when the first input
diff --git a/fold-debounce.cabal b/fold-debounce.cabal
--- a/fold-debounce.cabal
+++ b/fold-debounce.cabal
@@ -1,5 +1,5 @@
 name:                   fold-debounce
-version:                0.2.0.0
+version:                0.2.0.1
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -16,25 +16,25 @@
 library
   default-language:     Haskell2010
   hs-source-dirs:       src
-  ghc-options:          -Wall
+  ghc-options:          -Wall -fno-warn-unused-imports
   exposed-modules:      Control.FoldDebounce
   default-extensions:   DeriveDataTypeable
   -- other-modules:
   build-depends:        base >= 4.6.0 && < 4.9,
-                        data-default >=0.5.3 && <0.6,
+                        data-default-class >=0.0.1,
                         stm >=2.4.2 && <2.5,
-                        time >=1.4.0 && <1.6,
+                        time >=1.4.0 && <1.7,
                         stm-delay >=0.1.1 && <0.2
 
 test-suite spec
   type:                 exitcode-stdio-1.0
   default-language:     Haskell2010
   hs-source-dirs:       test
-  ghc-options:          -Wall
+  ghc-options:          -Wall -fno-warn-unused-imports "-with-rtsopts=-M512m"
   main-is:              Spec.hs
   other-modules:        Control.FoldDebounceSpec
   build-depends:        base, fold-debounce,
-                        hspec >=2.1.7 && <2.2,
+                        hspec >=2.1.7 && <2.3,
                         stm,
                         time
 
@@ -42,11 +42,11 @@
   type:                 exitcode-stdio-1.0
   default-language:     Haskell2010
   hs-source-dirs:       test
-  ghc-options:          -Wall -threaded
+  ghc-options:          -Wall -threaded -fno-warn-unused-imports "-with-rtsopts=-M512m"
   main-is:              Spec.hs
   other-modules:        Control.FoldDebounceSpec
   build-depends:        base, fold-debounce,
-                        hspec >=2.1.7 && <2.2,
+                        hspec >=2.1.7 && <2.3,
                         stm,
                         time
 
diff --git a/src/Control/FoldDebounce.hs b/src/Control/FoldDebounce.hs
--- a/src/Control/FoldDebounce.hs
+++ b/src/Control/FoldDebounce.hs
@@ -81,7 +81,7 @@
 import Control.Exception (Exception, SomeException, bracket)
 import Data.Typeable (Typeable)
 
-import Data.Default (Default(def))
+import Data.Default.Class (Default(def))
 import Control.Concurrent.STM (TChan, readTChan, newTChanIO, writeTChan,
                                TVar, readTVar, writeTVar, newTVarIO,
                                STM, retry, atomically, throwSTM)
diff --git a/test/Control/FoldDebounceSpec.hs b/test/Control/FoldDebounceSpec.hs
--- a/test/Control/FoldDebounceSpec.hs
+++ b/test/Control/FoldDebounceSpec.hs
@@ -6,7 +6,7 @@
 
 import Data.Time (getCurrentTime, addUTCTime)
 import Control.Monad.STM (atomically, STM)
-import Control.Concurrent.STM.TChan (TChan,newTChan,writeTChan,readTChan,tryPeekTChan,tryReadTChan)
+import Control.Concurrent.STM.TChan (TChan,newTChan,writeTChan,readTChan,tryReadTChan)
 import Test.Hspec
 import qualified Control.FoldDebounce as F
 
@@ -58,8 +58,8 @@
     it "waits for more events that follow the first event" $ do
       (trig, output) <- fifoTrigger F.def { F.delay = 500000 }
       F.send trig 10
-      threadDelay 30000
-      atomically (tryPeekTChan output) `shouldReturn` Nothing
+      threadDelay 200000
+      atomically (tryReadTChan output) `shouldReturn` Nothing
       threadDelay 500000
       atomically (tryReadTChan output) `shouldReturn` Just [10]
       F.close trig