diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Revision history for greskell-core
 
+## 0.1.2.3  -- 2018-09-05
+
+* Confirmed test with `QuickCheck-2.12` and `hspec-2.5.6`.
+
+
 ## 0.1.2.2  -- 2018-07-24
 
 * Confirmed test with `doctest-discover-0.2.0.0`.
diff --git a/greskell-core.cabal b/greskell-core.cabal
--- a/greskell-core.cabal
+++ b/greskell-core.cabal
@@ -1,5 +1,5 @@
 name:                   greskell-core
-version:                0.1.2.2
+version:                0.1.2.3
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -56,7 +56,7 @@
   build-depends:        base, text, aeson, unordered-containers, vector,
                         greskell-core,
                         hspec >=2.2.3,
-                        QuickCheck >=2.8.2 && <2.12,
+                        QuickCheck >=2.8.2 && <2.13,
                         bytestring >=0.10.8.1 && <0.11
 
 test-suite doctest