diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Revision history for wild-bind
 
+## 0.1.2.1  -- 2018-06-19
+
+* Confirmed test with `containers-0.6.0.1`.
+
+
 ## 0.1.2.0  -- 2018-04-10
 
 * Add `Semigroup` instance to `Binding` and `SeqBinding`.
diff --git a/wild-bind.cabal b/wild-bind.cabal
--- a/wild-bind.cabal
+++ b/wild-bind.cabal
@@ -1,5 +1,5 @@
 name:                   wild-bind
-version:                0.1.2.0
+version:                0.1.2.1
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -28,7 +28,7 @@
   -- other-modules:        
   build-depends:        base >=4.6 && <4.12,
                         text >=1.2.0 && <1.3,
-                        containers >=0.5.0 && <0.6,
+                        containers >=0.5.0 && <0.7,
                         transformers >=0.3.0 && <0.6,
                         semigroups >=0.16.2.2 && <0.19