diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for pms-ui-response
 
+## 0.0.5.0 -- 2025-07-13
+
+* Added serial tool.
+
 ## 0.0.4.0 -- 2025-07-06
 
 *Added resources interface.
diff --git a/pms-ui-response.cabal b/pms-ui-response.cabal
--- a/pms-ui-response.cabal
+++ b/pms-ui-response.cabal
@@ -1,4 +1,4 @@
-cabal-version:      3.12
+cabal-version: 2.4
 -- The cabal-version field refers to the version of the .cabal specification,
 -- and can be different from the cabal-install (the tool) version and the
 -- Cabal (the library) version you are using. As such, the Cabal (the library)
@@ -20,7 +20,7 @@
 -- PVP summary:     +-+------- breaking API changes
 --                  | | +----- non-breaking API additions
 --                  | | | +--- code changes with no API change
-version:            0.0.4.0
+version:            0.0.5.0
 
 -- A short (one-line) description of the package.
 synopsis:           pms-ui-response
@@ -72,7 +72,7 @@
     -- other-extensions:
 
     -- Other library packages from which modules are imported.
-    build-depends:    base ^>=4.21.0.0,
+    build-depends:    base >= 4.18 && < 5,
                       data-default,
                       monad-logger,
                       mtl,
@@ -91,15 +91,15 @@
     hs-source-dirs:   src
 
     -- Base language which the package is written in.
-    default-language: GHC2021
-    default-extensions:  LambdaCase
+    default-language: Haskell2010
+    -- default-extensions:  LambdaCase
 
 test-suite pms-ui-response-test
     -- Import common warning flags.
     ghc-options: -Wall -threaded
 
     -- Base language which the package is written in.
-    default-language: GHC2021
+    default-language: Haskell2010
 
     -- Modules included in this executable, other than Main.
     other-modules:    PMS.UI.Response.App.ControlSpec
@@ -117,7 +117,7 @@
     main-is:          Spec.hs
 
     -- Test dependencies.
-    build-depends:    base ^>=4.21.0.0,
+    build-depends:    base >= 4.18 && < 5,
                       hspec,
                       hspec-discover,
                       data-default,
diff --git a/src/PMS/UI/Response/App/Control.hs b/src/PMS/UI/Response/App/Control.hs
--- a/src/PMS/UI/Response/App/Control.hs
+++ b/src/PMS/UI/Response/App/Control.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE LambdaCase #-}
+
 module PMS.UI.Response.App.Control where
 
 import System.IO
diff --git a/src/PMS/UI/Response/DS/Core.hs b/src/PMS/UI/Response/DS/Core.hs
--- a/src/PMS/UI/Response/DS/Core.hs
+++ b/src/PMS/UI/Response/DS/Core.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE LambdaCase #-}
 
 module PMS.UI.Response.DS.Core where