diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for greskell
 
+## 1.2.0.2  -- 2021-11-08
+
+* Confirm test with `base-4.15.0.0`.
+
 ## 1.2.0.1  -- 2021-02-11
 
 * Confirm test with `doctest-0.18`.
diff --git a/greskell.cabal b/greskell.cabal
--- a/greskell.cabal
+++ b/greskell.cabal
@@ -1,5 +1,5 @@
 name:                   greskell
-version:                1.2.0.1
+version:                1.2.0.2
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -39,7 +39,7 @@
                         Data.Greskell.NonEmptyLike,
                         Data.Greskell.Logic
   -- other-modules:        
-  build-depends:        base >=4.9.0.0 && <4.15,
+  build-depends:        base >=4.9.0.0 && <4.16,
                         greskell-core >=0.1.3.0 && <0.2,
                         text >=1.2.2.1 && <1.3,
                         transformers >=0.5.2 && <0.6,
@@ -66,6 +66,7 @@
                         Data.Greskell.ExtraSpec,
                         Data.Greskell.PMapSpec,
                         Data.Greskell.LogicSpec
+  build-tool-depends:   hspec-discover:hspec-discover
   build-depends:        base, text, aeson,  unordered-containers,
                         greskell, greskell-core,
                         hspec >=2.2.3,
@@ -77,6 +78,7 @@
   hs-source-dirs:       test
   ghc-options:          -Wall -fno-warn-unused-imports "-with-rtsopts=-M512m"
   main-is:              DocTest.hs
+  build-tool-depends:   doctest-discover:doctest-discover
   build-depends:        base,
                         doctest >=0.11 && <0.19,
                         doctest-discover >=0.1.0.8 && <0.3