diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for stopwatch
 
+## 0.1.0.7 -- 2025-09-01
+
+* Confirmed test with `transformers-0.6.1.0`.
+
 ## 0.1.0.6 -- 2019-05-01
 
 * Confirmed test with `clock-0.8`.
diff --git a/stopwatch.cabal b/stopwatch.cabal
--- a/stopwatch.cabal
+++ b/stopwatch.cabal
@@ -1,5 +1,5 @@
 name:                   stopwatch
-version:                0.1.0.6
+version:                0.1.0.7
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -20,7 +20,7 @@
   exposed-modules:      Control.StopWatch
   -- other-modules:
   build-depends:        base >=2 && <5.0,
-                        transformers >=0.3.0 && <0.6,
+                        transformers >=0.3.0 && <0.7,
                         -- clock <0.5 is buggy!
                         clock >=0.5 && <0.9
 
@@ -53,6 +53,7 @@
     cpp-options:        -DTEST_DELAY_UPPER_BOUND
   main-is:              Spec.hs
   other-modules:        Control.StopWatchSpec
+  build-tool-depends:   hspec-discover:hspec-discover
   build-depends:        base, stopwatch,
                         hspec,
                         clock
