diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1a3e2e1..f6097ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
 
       - name: Setup Java (temurin@11)
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
@@ -50,7 +50,7 @@ jobs:
         run: tar cf targets.tar target project/target
 
       - name: Upload target directories
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: target-${{ matrix.os }}-${{ matrix.scala }}-${{ matrix.java }}
           path: targets.tar
@@ -73,14 +73,14 @@ jobs:
 
       - name: Setup Java (temurin@11)
         if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11
           cache: sbt
 
       - name: Download target directories (2.12.18)
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: target-${{ matrix.os }}-2.12.18-${{ matrix.java }}
 
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 06b5f5d..fd740cb 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
 addSbtPlugin("de.heikoseeberger" % "sbt-header"         % "5.10.0")
 addSbtPlugin("org.scalameta"     % "sbt-scalafmt"       % "2.4.6")
-addSbtPlugin("com.github.sbt"    % "sbt-github-actions" % "0.16.0")
+addSbtPlugin("com.github.sbt"    % "sbt-github-actions" % "0.22.0")
 addSbtPlugin("com.github.sbt"    % "sbt-ci-release"     % "1.5.12")