diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Revision history for stopwatch
 
+## 0.1.0.5 -- 2018-03-14
+
+* Confirmed test with `hspec-2.5.0`.
+  Remove its dependency upper bound, because I think it's stable enough.
+
+
 ## 0.1.0.4 -- 2017-01-24
 
 * Confirmed build with `hspec-2.4.0`.
diff --git a/stopwatch.cabal b/stopwatch.cabal
--- a/stopwatch.cabal
+++ b/stopwatch.cabal
@@ -1,5 +1,5 @@
 name:                   stopwatch
-version:                0.1.0.4
+version:                0.1.0.5
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -54,7 +54,7 @@
   main-is:              Spec.hs
   other-modules:        Control.StopWatchSpec
   build-depends:        base, stopwatch,
-                        hspec <2.5,
+                        hspec,
                         clock
 
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