diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index eeb1d8e..b3ec391 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -40,10 +40,10 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: ubuntu-22.04, r: '3.6.3'}
-          - {os: ubuntu-22.04, r: '4.1.1'}
+          - {os: ${{ vars.RUNNER_UBUNTU }}, r: '3.6.3'}
+          - {os: ${{ vars.RUNNER_UBUNTU }}, r: '4.1.1'}
           # CRAN submission required to use this R version
-          - {os: ubuntu-22.04, r: 'release'}
+          - {os: ${{ vars.RUNNER_UBUNTU }}, r: 'release'}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
diff --git a/.github/workflows/fill-gh-draft-release.yml b/.github/workflows/fill-gh-draft-release.yml
index 0a6b058..f3c1d4d 100644
--- a/.github/workflows/fill-gh-draft-release.yml
+++ b/.github/workflows/fill-gh-draft-release.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   update_release_draft:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     permissions:
       # To create or update releases
       # https://docs.github.com/en/rest/reference/permissions-required-for-github-apps#permission-on-contents
diff --git a/.github/workflows/pr-metadata-checks.yml b/.github/workflows/pr-metadata-checks.yml
index 5e516d3..89513b7 100644
--- a/.github/workflows/pr-metadata-checks.yml
+++ b/.github/workflows/pr-metadata-checks.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   pr-title:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     permissions:
       pull-requests: write # post comments when the PR title doesn't match the "Conventional Commits" rules
     steps:
diff --git a/.github/workflows/publish-documentation-pr-preview.yml b/.github/workflows/publish-documentation-pr-preview.yml
index 347cab2..f9b695b 100644
--- a/.github/workflows/publish-documentation-pr-preview.yml
+++ b/.github/workflows/publish-documentation-pr-preview.yml
@@ -22,7 +22,7 @@ on:
 jobs:
   # for Pull Request
   pr_preview: # the id is used by surge to generate the surge url
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     permissions:
       pull-requests: write # surge-preview: PR comments
     steps:
diff --git a/.github/workflows/publish-documentation.yml b/.github/workflows/publish-documentation.yml
index bf1c094..9f4ffcb 100644
--- a/.github/workflows/publish-documentation.yml
+++ b/.github/workflows/publish-documentation.yml
@@ -27,7 +27,7 @@ concurrency:
 jobs:
   # Build job
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     steps:
       - uses: actions/checkout@v4
       - name: Build
@@ -50,7 +50,7 @@ jobs:
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 403f8bb..14b3c69 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,7 +9,7 @@ on:
         default: 'patch'
 jobs:
   bumpVersion:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     steps:
       - run: |
           echo "New version type: ${{ github.event.inputs.type }}"
diff --git a/.github/workflows/update-bpmn-visualization-version.yml b/.github/workflows/update-bpmn-visualization-version.yml
index 4f799a3..e25c991 100644
--- a/.github/workflows/update-bpmn-visualization-version.yml
+++ b/.github/workflows/update-bpmn-visualization-version.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   updateVersion:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNNER_UBUNTU }}
     env:
       VERSION: ${{ github.event.client_payload.version || github.event.inputs.version }}
     steps: