diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Revision history for wild-bind-x11
 
+## 0.2.0.1  -- 2018-02-06
+
+* Confirmed test with `async-2.2.1`.
+
+
 ## 0.2.0.0  -- 2018-01-01
 
 * Fix crash when some kind of window (e.g. xdvi) is active. 
diff --git a/wild-bind-x11.cabal b/wild-bind-x11.cabal
--- a/wild-bind-x11.cabal
+++ b/wild-bind-x11.cabal
@@ -1,5 +1,5 @@
 name:                   wild-bind-x11
-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
@@ -69,7 +69,7 @@
                         wild-bind, X11, text, transformers,
                         hspec >=2.1.7,
                         time >=1.5.0 && <1.9,
-                        async >=2.0.2 && <2.2
+                        async >=2.0.2 && <2.3
 
 source-repository head
   type:                 git