diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f102ee8..f443139 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@
 # (outdated) Documentation:
 #   https://github.com/3MFConsortium/spec_conventions/blob/master/generatePDFs/generatePDFs.md
 
-on: [pull_request]
+on: [pull_request, workflow_dispatch]
 name: Build
 jobs:
   build-linux:
@@ -12,7 +12,7 @@ jobs:
     env:
       SPECNAME: "3MF Core Specification"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - run: pip install wheel
@@ -20,7 +20,7 @@ jobs:
       - run: ./markdownToPDF/install_wkhtmltopdf.sh
       - run: ./markdownToPDF/mdToPDF.sh "$SPECNAME"
       - name: Upload PDF
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ env.SPECNAME }}.pdf
           path: ${{ env.SPECNAME }}.pdf