diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index fc298f87..f0be4a8a 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -32,13 +32,13 @@ jobs:
           - {os: windows-latest, r: '4.1'}
 
           # Use older ubuntu to maximise backward compatibility
-          - {os: ubuntu-20.04,   r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-20.04,   r: 'release'}
-          - {os: ubuntu-20.04,   r: 'release', custom: 'no-cpp11test'}
-          - {os: ubuntu-20.04,   r: 'oldrel-1'}
-          - {os: ubuntu-20.04,   r: 'oldrel-2'}
-          - {os: ubuntu-20.04,   r: 'oldrel-3'}
-          - {os: ubuntu-20.04,   r: 'oldrel-4'}
+          - {os: ubuntu-22.04,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-22.04,   r: 'release'}
+          - {os: ubuntu-22.04,   r: 'release', custom: 'no-cpp11test'}
+          - {os: ubuntu-22.04,   r: 'oldrel-1'}
+          - {os: ubuntu-22.04,   r: 'oldrel-2'}
+          - {os: ubuntu-22.04,   r: 'oldrel-3'}
+          - {os: ubuntu-22.04,   r: 'oldrel-4'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
index 80ad7bda..16bd5646 100644
--- a/.github/workflows/format.yaml
+++ b/.github/workflows/format.yaml
@@ -9,15 +9,15 @@ name: format_check
 
 jobs:
   format_check:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
 
       - name: Install ClangFormat
-        run: sudo apt-get install -y clang-format-10
+        run: sudo apt-get install -y clang-format-12
 
       - name: Run ClangFormat
-        run: make format clang_format=clang-format-10
+        run: make format clang_format=clang-format-12
 
       - name: Check for a non-empty diff
         run: git diff-files -U --exit-code