diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for staversion
 
+## 0.2.4.1  -- 2021-05-16
+
+* Confirm test with `base-4.15.0.0` and `Cabal-3.4.0.0`.
+
 ## 0.2.4.0  -- 2020-10-26
 
 * Now staversion supports fetching and parsing build plan YAML files of the "Pantry" format (Fix #6).
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -1,4 +1,7 @@
 module Main
        (main) where
 
-import Staversion.Internal.Exec (main)
+import qualified Staversion.Internal.Exec as E
+
+main :: IO ()
+main = E.main
diff --git a/staversion.cabal b/staversion.cabal
--- a/staversion.cabal
+++ b/staversion.cabal
@@ -1,5 +1,5 @@
 name:                   staversion
-version:                0.2.4.0
+version:                0.2.4.1
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -64,7 +64,7 @@
                         Staversion.Internal.HTTP,
                         Staversion.Internal.Megaparsec,
                         Staversion.Internal.EIO
-  build-depends:        base >=4.8 && <4.15,
+  build-depends:        base >=4.8 && <4.16,
                         unordered-containers >=0.2.3 && <0.3,
                         hashable >=1.2.6.1 && <1.4,
                         aeson >=0.8.0 && <1.6,
@@ -82,7 +82,7 @@
                         transformers-compat >=0.4.0 && <0.7,
                         megaparsec >=4.2.0 && <9.1,
                         semigroups >=0.18.0.1 && <0.20,
-                        Cabal >=1.22.6.0 && <3.3,
+                        Cabal >=1.22.6.0 && <3.5,
                         pretty >=1.1.2.0 && <1.2,
                         ansi-wl-pprint >=0.6.7.3 && <0.7,
                         process >=1.2.3.0 && <1.7
@@ -118,6 +118,7 @@
                         Staversion.Internal.AggregateSpec,
                         Staversion.Internal.CommandSpec,
                         Staversion.Internal.TestUtil
+  build-tool-depends:   hspec-discover:hspec-discover
   build-depends:        base, staversion, text, filepath, bytestring,
                         Cabal, semigroups, unordered-containers,
                         hspec >=2.1.7,
