diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 984acb7..c71e758 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -73,7 +73,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
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 d11b86f..5cc8fda 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -17,7 +17,7 @@ addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.10.0")
 
 addSbtPlugin("com.yurique" % "sbt-embedded-files" % "0.4.0")
 
-addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.15.0")
+addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.19.0")
 
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")