diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for net-spider-rpl
 
+## 0.4.1.4  -- 2020-12-30
+
+* Confirm test with `greskell-1.2.0.0`
+
 ## 0.4.1.3  -- 2020-06-21
 
 * Confirm test with `base-4.13` and `base-4.14`.
diff --git a/net-spider-rpl.cabal b/net-spider-rpl.cabal
--- a/net-spider-rpl.cabal
+++ b/net-spider-rpl.cabal
@@ -1,5 +1,5 @@
 name:                   net-spider-rpl
-version:                0.4.1.3
+version:                0.4.1.4
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -35,7 +35,7 @@
   other-modules:        NetSpider.RPL.JSONUtil
   build-depends:        base >=4.11.1.0 && <4.15,
                         aeson >=1.3.1.1 && <1.6,
-                        greskell >=1.0.0.0 && <1.2,
+                        greskell >=1.0.0.0 && <1.3,
                         net-spider >=0.4.0.0 && <0.5,
                         text >=1.2.3.1 && <1.3,
                         ip >=1.3.0 && <1.8,