diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 578290d7..77e3a70c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,50 +29,40 @@ 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@8)
         if: matrix.java == 'temurin@8'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 8
+          cache: sbt
 
       - name: Setup Java (temurin@17)
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
-
-      - 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: Install libutf8proc
         run: sudo apt-get install libutf8proc-dev
 
       - name: Check that workflows are up to date
-        run: sbt ++${{ matrix.scala }} githubWorkflowCheck
+        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
 
       - name: Build project
-        run: sbt ++${{ matrix.scala }} test
+        run: sbt '++ ${{ matrix.scala }}' test
 
       - name: Compress target directories
         run: tar cf targets.tar target core/native/target localesMinimalEnUSDb/native/target localesFullCurrenciesDb/target macroutils/target core/js/target core/jvm/target tests/js/target localesFullDb/.js/target localesFullDb/.native/target localesMinimalEnUSDb/js/target tests/jvm/target demo/native/target localesMinimalEnDb/native/target localesMinimalEnDb/js/target tests/native/target demo/js/target project/target
 
       - name: Upload target directories
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: target-${{ matrix.os }}-${{ matrix.scala }}-${{ matrix.java }}
           path: targets.tar
@@ -89,38 +79,28 @@ 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@8)
         if: matrix.java == 'temurin@8'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 8
+          cache: sbt
 
       - name: Setup Java (temurin@17)
         if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 17
-
-      - 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: Download target directories (2.12.18)
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: target-${{ matrix.os }}-2.12.18-${{ matrix.java }}
 
@@ -130,7 +110,7 @@ jobs:
           rm targets.tar
 
       - name: Download target directories (2.13.12)
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: target-${{ matrix.os }}-2.13.12-${{ matrix.java }}
 
@@ -140,7 +120,7 @@ jobs:
           rm targets.tar
 
       - name: Download target directories (3.2.2)
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: target-${{ matrix.os }}-3.2.2-${{ matrix.java }}
 
@@ -154,4 +134,4 @@ jobs:
           PGP_SECRET: ${{ secrets.PGP_SECRET }}
           SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-        run: sbt ++${{ matrix.scala }} ci-release
+        run: sbt ci-release
diff --git a/.github/workflows/clean.yml b/.github/workflows/clean.yml
index 547aaa43..bfc865d5 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