diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad34055..ddb7454 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,45 +22,34 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.15]
+        scala: [2.12.16]
         java: [temurin@11]
     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: Test
-        run: sbt ++${{ matrix.scala }} clean test
+        run: sbt '++ ${{ matrix.scala }}' clean test
 
       - name: Compress target directories
         run: tar cf targets.tar modules/validating/target modules/utils/target modules/utilsTest/target target utils-docs/target modules/testsuite/target modules/typing/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
@@ -72,43 +61,32 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.15]
+        scala: [2.12.16]
         java: [temurin@11]
     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
+          cache: sbt
 
-      - 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') }}-${{ hashFiles('project/build.properties') }}
-
-      - name: Download target directories (2.12.15)
-        uses: actions/download-artifact@v2
+      - name: Download target directories (2.12.16)
+        uses: actions/download-artifact@v4
         with:
-          name: target-${{ matrix.os }}-2.12.15-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.12.16-${{ matrix.java }}
 
-      - name: Inflate target directories (2.12.15)
+      - name: Inflate target directories (2.12.16)
         run: |
           tar xf targets.tar
           rm targets.tar
 
       - name: Publish project
-        run: sbt ++${{ matrix.scala }} +publish
+        run: sbt +publish
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
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 24c9da9..7491311 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-addSbtPlugin("com.codecommit"     % "sbt-github-actions"       % "0.14.2")
+addSbtPlugin("com.github.sbt"     % "sbt-github-actions"       % "0.22.0")
 addSbtPlugin("com.eed3si9n"       % "sbt-buildinfo"            % "0.10.0")
 addSbtPlugin("org.scalameta"      % "sbt-mdoc"                 % "2.3.2")
 addSbtPlugin("com.github.sbt"     % "sbt-unidoc"               % "0.5.0")