diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 4e47ee12..5efc04dd 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -161,7 +161,7 @@ jobs:
         run: |
           $CABAL v2-update -v
       - name: cache (tools)
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-e27a5680
           path: ~/.haskell-ci-tools
@@ -188,13 +188,13 @@ jobs:
           if [ $((HCNUMVER < 90000)) -ne 0 ] ; then $CABAL --store-dir=$HOME/.haskell-ci-tools/store v2-install $ARG_COMPILER --ignore-project -j2 doctest --constraint='doctest ^>=0.22.0' ; fi
           if [ $((HCNUMVER < 90000)) -ne 0 ] ; then doctest --version ; fi
       - name: save cache (tools)
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-e27a5680
           path: ~/.haskell-ci-tools
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -246,7 +246,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -299,7 +299,7 @@ jobs:
           if [ $((HCNUMVER < 80400)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='deepseq ==1.4.*' --constraint='binary installed' all ; fi
           if [ $((HCNUMVER < 80400)) -ne 0 ] ; then $CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK --disable-tests --disable-benchmarks --constraint='deepseq ==1.4.*' --constraint='binary installed' all ; fi
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/all-versions.github b/fixtures/all-versions.github
index d7ba1fbb..f2464160 100644
--- a/fixtures/all-versions.github
+++ b/fixtures/all-versions.github
@@ -509,7 +509,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -548,7 +548,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -578,7 +578,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/copy-fields-all.github b/fixtures/copy-fields-all.github
index db502829..dc1e6c15 100644
--- a/fixtures/copy-fields-all.github
+++ b/fixtures/copy-fields-all.github
@@ -289,7 +289,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -354,7 +354,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -390,7 +390,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/copy-fields-none.github b/fixtures/copy-fields-none.github
index 5cddcde0..88e05643 100644
--- a/fixtures/copy-fields-none.github
+++ b/fixtures/copy-fields-none.github
@@ -289,7 +289,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -343,7 +343,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -379,7 +379,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/copy-fields-some.github b/fixtures/copy-fields-some.github
index a75d3f6e..5fdc1d1f 100644
--- a/fixtures/copy-fields-some.github
+++ b/fixtures/copy-fields-some.github
@@ -289,7 +289,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -346,7 +346,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -382,7 +382,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/doctest-version.github b/fixtures/doctest-version.github
index 48bd1e42..b98582f3 100644
--- a/fixtures/doctest-version.github
+++ b/fixtures/doctest-version.github
@@ -500,7 +500,7 @@ jobs:
         run: |
           $CABAL v2-update -v
       - name: cache (tools)
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-de352c88
           path: ~/.haskell-ci-tools
@@ -518,13 +518,13 @@ jobs:
           if [ $((! GHCJSARITH && HCNUMVER >= 80000)) -ne 0 ] ; then $CABAL --store-dir=$HOME/.haskell-ci-tools/store v2-install $ARG_COMPILER --ignore-project -j2 doctest --constraint='doctest ^>=0.20' ; fi
           if [ $((! GHCJSARITH && HCNUMVER >= 80000)) -ne 0 ] ; then doctest --version ; fi
       - name: save cache (tools)
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-de352c88
           path: ~/.haskell-ci-tools
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -563,7 +563,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -597,7 +597,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/doctest.github b/fixtures/doctest.github
index 43793b28..0a55890d 100644
--- a/fixtures/doctest.github
+++ b/fixtures/doctest.github
@@ -500,7 +500,7 @@ jobs:
         run: |
           $CABAL v2-update -v
       - name: cache (tools)
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-4a8bd37c
           path: ~/.haskell-ci-tools
@@ -518,13 +518,13 @@ jobs:
           if [ $((! GHCJSARITH && HCNUMVER >= 80000)) -ne 0 ] ; then $CABAL --store-dir=$HOME/.haskell-ci-tools/store v2-install $ARG_COMPILER --ignore-project -j2 doctest --constraint='doctest ^>=0.22.0' ; fi
           if [ $((! GHCJSARITH && HCNUMVER >= 80000)) -ne 0 ] ; then doctest --version ; fi
       - name: save cache (tools)
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-tools-4a8bd37c
           path: ~/.haskell-ci-tools
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -563,7 +563,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -597,7 +597,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/empty-line.github b/fixtures/empty-line.github
index 4f873dd0..f8a4abbe 100644
--- a/fixtures/empty-line.github
+++ b/fixtures/empty-line.github
@@ -301,7 +301,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -361,7 +361,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -397,7 +397,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/enabled-jobs.github b/fixtures/enabled-jobs.github
index 502dfd44..054c40d2 100644
--- a/fixtures/enabled-jobs.github
+++ b/fixtures/enabled-jobs.github
@@ -419,7 +419,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -458,7 +458,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -488,7 +488,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/irc-channels.github b/fixtures/irc-channels.github
index b37a533f..df293771 100644
--- a/fixtures/irc-channels.github
+++ b/fixtures/irc-channels.github
@@ -316,7 +316,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -352,7 +352,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -382,7 +382,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/messy.github b/fixtures/messy.github
index db1a6104..d598cfcc 100644
--- a/fixtures/messy.github
+++ b/fixtures/messy.github
@@ -303,7 +303,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -362,7 +362,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -398,7 +398,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/psql.github b/fixtures/psql.github
index ad3d9b8e..14053f94 100644
--- a/fixtures/psql.github
+++ b/fixtures/psql.github
@@ -295,7 +295,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -331,7 +331,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -361,7 +361,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/fixtures/travis-patch.github b/fixtures/travis-patch.github
index 3fbd86af..c203cd1a 100644
--- a/fixtures/travis-patch.github
+++ b/fixtures/travis-patch.github
@@ -289,7 +289,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: source
       - name: initial cabal.project for sdist
@@ -325,7 +325,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -355,7 +355,7 @@ jobs:
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         if: always()
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
diff --git a/haskell-ci.cabal b/haskell-ci.cabal
index 6d142764..d3e16303 100644
--- a/haskell-ci.cabal
+++ b/haskell-ci.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.2
 name:               haskell-ci
-version:            0.19.20240416
+version:            0.19.20240418
 synopsis:           Cabal package script generator for Travis-CI
 description:
   Script generator (@haskell-ci@) for
diff --git a/src/HaskellCI/GitHub.hs b/src/HaskellCI/GitHub.hs
index d9cd7019..2a992f7f 100644
--- a/src/HaskellCI/GitHub.hs
+++ b/src/HaskellCI/GitHub.hs
@@ -313,7 +313,7 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                 Binary.put cfgHLint
                 Binary.put cfgGhcupJobs -- GHC location affects doctest, e.g
 
-        when (doctestEnabled || cfgHLintEnabled cfgHLint) $ githubUses "cache (tools)" "actions/cache/restore@v3"
+        when (doctestEnabled || cfgHLintEnabled cfgHLint) $ githubUses "cache (tools)" "actions/cache/restore@v4"
             [ ("key", "${{ runner.os }}-${{ matrix.compiler }}-tools-" ++ toolsConfigHash)
             , ("path", "~/.haskell-ci-tools")
             ]
@@ -374,12 +374,12 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                 forHLint $ "$CABAL --store-dir=$HOME/.haskell-ci-tools/store v2-install $ARG_COMPILER --ignore-project -j2 hlint" ++ hlintVersionConstraint
                 forHLint "hlint --version"
 
-        when (doctestEnabled || cfgHLintEnabled cfgHLint) $ githubUsesIf "save cache (tools)" "actions/cache/save@v3" "always()"
+        when (doctestEnabled || cfgHLintEnabled cfgHLint) $ githubUsesIf "save cache (tools)" "actions/cache/save@v4" "always()"
             [ ("key", "${{ runner.os }}-${{ matrix.compiler }}-tools-" ++ toolsConfigHash)
             , ("path", "~/.haskell-ci-tools")
             ]
 
-        githubUses "checkout" "actions/checkout@v3" $ buildList $ do
+        githubUses "checkout" "actions/checkout@v4" $ buildList $ do
             item ("path", "source")
             when cfgSubmodules $
                 item ("submodules", "true")
@@ -470,7 +470,7 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
 
         -- This a hack. https://github.com/actions/cache/issues/109
         -- Hashing Java - Maven style.
-        githubUses "restore cache" "actions/cache/restore@v3"
+        githubUses "restore cache" "actions/cache/restore@v4"
             [ ("key", "${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}")
             , ("restore-keys", "${{ runner.os }}-${{ matrix.compiler }}-")
             , ("path", "~/.cabal/store")
@@ -614,7 +614,7 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
             when (csHaddock cs) $
                 sh_cs $ "$CABAL v2-haddock --disable-documentation" ++ haddockFlags ++ " $ARG_COMPILER " ++ withHaddock ++ " " ++ allFlags ++ " all"
 
-        githubUsesIf "save cache" "actions/cache/save@v3" "always()"
+        githubUsesIf "save cache" "actions/cache/save@v4" "always()"
           [ ("key", "${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}")
           , ("path", "~/.cabal/store")
           ]