diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c33383..046fa8f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,34 +27,23 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Setup Java (temurin@11)
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
-
-      - name: Cache sbt
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/.sbt
-            ~/.ivy2/cache
-            ~/.coursier/cache/v1
-            ~/.cache/coursier/v1
-            ~/AppData/Local/Coursier/Cache/v1
-            ~/Library/Caches/Coursier/v1
-          key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
+          cache: sbt
 
       - name: Check that workflows are up to date
-        run: sbt ++${{ matrix.scala }} githubWorkflowCheck
+        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
 
       - name: Run tests
-        run: sbt ++${{ matrix.scala }} test
+        run: sbt '++ ${{ matrix.scala }}' test
 
       - name: Package artifact
-        run: 'sbt ++${{ matrix.scala }} universal:packageBin'
+        run: 'sbt ''++ ${{ matrix.scala }}'' universal:packageBin'
diff --git a/.github/workflows/clean.yml b/.github/workflows/clean.yml
index 547aaa4..bfc865d 100644
--- a/.github/workflows/clean.yml
+++ b/.github/workflows/clean.yml
@@ -17,6 +17,7 @@ jobs:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Delete artifacts
+        shell: bash {0}
         run: |
           # Customize those three lines with your repository and credentials:
           REPO=${GITHUB_API_URL}/repos/${{ github.repository }}
@@ -25,7 +26,7 @@ jobs:
           ghapi() { curl --silent --location --user _:$GITHUB_TOKEN "$@"; }
 
           # A temporary file which receives HTTP response headers.
-          TMPFILE=/tmp/tmp.$$
+          TMPFILE=$(mktemp)
 
           # An associative array, key: artifact name, value: number of artifacts of that name.
           declare -A ARTCOUNT