diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,13 @@
 # Revision history for fold-debounce-conduit
 
+## 0.1.0.1  -- 2016-05-03
+
+* Bump dependency version upper bounds.
+* Expand dependency lower bound for stm. Now it supports stm-2.4.2,
+  which is provided by Haskell Platform 2013.2.0.0.
+
+
+
 ## 0.1.0.0  -- 2015-06-22
 
 * First version. Released on an unsuspecting world.
diff --git a/fold-debounce-conduit.cabal b/fold-debounce-conduit.cabal
--- a/fold-debounce-conduit.cabal
+++ b/fold-debounce-conduit.cabal
@@ -1,5 +1,5 @@
 name:                   fold-debounce-conduit
-version:                0.1.0.0
+version:                0.1.0.1
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -16,7 +16,7 @@
 library
   default-language:     Haskell2010
   hs-source-dirs:       src
-  ghc-options:          -Wall
+  ghc-options:          -Wall -fno-warn-unused-imports
   exposed-modules:      Data.Conduit.FoldDebounce
   -- other-modules:
   default-extensions:   FlexibleContexts
@@ -24,8 +24,8 @@
                         conduit >=1.2.4 && <1.3,
                         fold-debounce >=0.2.0 && <0.3,
                         resourcet >=1.1.5 && <1.2,
-                        stm >=2.4.4 && <2.5,
-                        transformers >=0.3.0 && <0.5,
+                        stm >=2.4.2 && <2.5,
+                        transformers >=0.3.0 && <0.6,
                         transformers-base >=0.4.4 && <0.5
 
 -- executable fold-debounce-conduit
@@ -41,12 +41,12 @@
   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:        Data.Conduit.FoldDebounceSpec
   build-depends:        base, fold-debounce-conduit, stm,
                         conduit, transformers, resourcet,
-                        hspec >=2.1.7 && <2.2
+                        hspec >=2.1.7 && <2.3
 
 source-repository head
   type:                 git
diff --git a/test/Data/Conduit/FoldDebounceSpec.hs b/test/Data/Conduit/FoldDebounceSpec.hs
--- a/test/Data/Conduit/FoldDebounceSpec.hs
+++ b/test/Data/Conduit/FoldDebounceSpec.hs
@@ -69,6 +69,9 @@
       threadDelay 20000
       atomically (readTVar terminated) `shouldReturn` True
     it "should terminate the debounced Source gracefully if the original Source throws exception" $ do
+      -- For now, the exception in the original Source is not handled,
+      -- i.e., we just let it terminate the thread. So we'll see the
+      -- error message while running the test.
       let s = (periodicSource 1000 ["a", "b"]) >> error "Exception in origSource" >> (periodicSource 1000 ["c", "d"])
       ret <- runResourceT $ debMonoid 100000 s $$ CL.consume
       ret `shouldBe` ["ab"]
@@ -109,6 +112,9 @@
       threadDelay 20000
       atomically (readTVar released) `shouldReturn` True
     it "should release the resource in the original Source when the original Source throws exception" $ do
+      -- Because the error is not handled, we'll see the error message
+      -- while running the test. (See above for the case "original
+      -- Source throwing exception")
       (released, orig_source) <- attachResource (periodicSource 10000 ["a", "b"] >> error "Exception in source")
       ret <- runResourceT $ debMonoid 500000 orig_source $$ CL.consume
       ret `shouldBe` ["ab"]