diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ce1125f5..43f2d6fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -99,7 +99,7 @@ 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 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
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 9524ef1b..ac402d81 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -13,5 +13,5 @@ addSbtPlugin("de.heikoseeberger"  % "sbt-header"                    % "5.9.0")
 addSbtPlugin("org.scalameta"      % "sbt-scalafmt"                  % "2.5.0")
 addSbtPlugin("com.github.sbt"     % "sbt-ci-release"                % "1.5.12")
 addSbtPlugin("ch.epfl.scala"      % "sbt-scalajs-bundler"           % "0.21.1")
-addSbtPlugin("com.github.sbt"     % "sbt-github-actions"            % "0.15.0")
+addSbtPlugin("com.github.sbt"     % "sbt-github-actions"            % "0.19.0")
 libraryDependencySchemes += "org.scala-lang.modules" %% "scala-xml" % VersionScheme.Always