diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 7bedcb8..8aa90cf 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   CodeQL-Build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
 
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index e8c657c..a78e6f5 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -10,7 +10,7 @@ permissions:
 
 jobs:
   dependency-review:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
       - uses: actions/dependency-review-action@v1
diff --git a/.github/workflows/dev-image.yml b/.github/workflows/dev-image.yml
index 92714f7..bf62abb 100644
--- a/.github/workflows/dev-image.yml
+++ b/.github/workflows/dev-image.yml
@@ -23,7 +23,7 @@ on:
 
 jobs:
   dev-image-test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
       - run: make build
diff --git a/.github/workflows/label-commenter.yml b/.github/workflows/label-commenter.yml
index 88efafd..4243162 100644
--- a/.github/workflows/label-commenter.yml
+++ b/.github/workflows/label-commenter.yml
@@ -12,7 +12,7 @@ on:
 
 jobs:
   comment:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
         with:
diff --git a/.github/workflows/purge-readme-image-cache.yml b/.github/workflows/purge-readme-image-cache.yml
index 7e72136..a0b3df7 100644
--- a/.github/workflows/purge-readme-image-cache.yml
+++ b/.github/workflows/purge-readme-image-cache.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   purge:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
 
     - run: >
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 19340dd..c8e59ba 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
 
diff --git a/.github/workflows/test-action.yml b/.github/workflows/test-action.yml
index 3500002..9fc7598 100644
--- a/.github/workflows/test-action.yml
+++ b/.github/workflows/test-action.yml
@@ -11,8 +11,9 @@ jobs:
     strategy:
       matrix:
         os:
+          - 'ubuntu-22.04'
           - 'ubuntu-20.04'
-          - 'ubuntu-18.04'
+          - 'ubuntu-latest'
           - 'macos-latest'
           - 'windows-latest'
         hugo-version:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 723958f..6262656 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,8 +16,9 @@ jobs:
     strategy:
       matrix:
         os:
+          - 'ubuntu-22.04'
           - 'ubuntu-20.04'
-          - 'ubuntu-18.04'
+          - 'ubuntu-latest'
           - 'macos-latest'
           - 'windows-latest'
     steps:
@@ -35,15 +36,15 @@ jobs:
       - run: npm ci
 
       - name: Run prettier
-        if: startsWith(matrix.os, 'ubuntu-18.04')
+        if: startsWith(matrix.os, 'ubuntu-22.04')
         run: npm run format:check
 
       - name: Run eslint
-        if: startsWith(matrix.os, 'ubuntu-18.04')
+        if: startsWith(matrix.os, 'ubuntu-22.04')
         run: npm run lint
 
       - name: Run ncc
-        if: startsWith(matrix.os, 'ubuntu-18.04')
+        if: startsWith(matrix.os, 'ubuntu-22.04')
         run: npm run build
 
       - run: npm test
diff --git a/.github/workflows/update-major-tag.yml b/.github/workflows/update-major-tag.yml
index e5cdd53..41c7b7a 100644
--- a/.github/workflows/update-major-tag.yml
+++ b/.github/workflows/update-major-tag.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   update:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
 
diff --git a/README.md b/README.md
index e231ed5..5532ec0 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ We no longer build or pull a Hugo docker image.
 Thanks to this change, we can complete this action in less than a few seconds.
 (A docker base action was taking about 1 min or more execution time to build and pull a docker image.)
 
-| OS (runs-on) | ubuntu-18.04, ubuntu-20.04 | macos-latest | windows-2019 |
+| OS (runs-on) | ubuntu-latest, ubuntu-20.04, ubuntu-22.04 | macos-latest | windows-2019 |
 |---|:---:|:---:|:---:|
 | Support | ✅️ | ✅️ | ✅️ |
 
@@ -80,7 +80,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
@@ -245,7 +245,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
@@ -300,7 +300,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
@@ -352,7 +352,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps: