diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 5bcf7d4..6f671c0 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -13,13 +13,13 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.8' ]
+        python-version: [ '3.10' ]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
diff --git a/.github/workflows/flake8.yml b/.github/workflows/flake8.yml
deleted file mode 100644
index f383de9..0000000
--- a/.github/workflows/flake8.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-name: Flake8
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v4
-      with:
-        python-version: '3.8'
-
-    - name: Install pre-commit hooks
-      run: |
-        pip install pre-commit
-        pre-commit install --install-hooks
-
-    - name: Code style check via pre-commit
-      run: |
-        pre-commit run --all-files
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index f093325..1c47b46 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 3bfc0cf..f88f60e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -17,17 +17,17 @@ jobs:
       group: ${{ github.workflow }}-${{ github.ref }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 2
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
 
     - name: Set up Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: '16.0'
 
@@ -55,7 +55,7 @@ jobs:
         python -m sphinx docs/ build/html -b html -D katex_prerender=1
 
     - name: Deploy documentation to Github pages
-      uses: peaceiris/actions-gh-pages@v3
+      uses: peaceiris/actions-gh-pages@v4
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./build/html
@@ -77,7 +77,7 @@ jobs:
 
     - name: Create release on Github
       id: create_release
-      uses: softprops/action-gh-release@v1
+      uses: softprops/action-gh-release@v2
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 51ef2a2..62e1adb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,22 +13,22 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, macOS-latest, windows-latest ]
-        python-version: [ '3.8' ]
+        python-version: [ '3.10' ]
         include:
           - os: ubuntu-latest
-            python-version: '3.9'
+            python-version: '3.8'
           - os: ubuntu-latest
-            python-version: '3.10'
+            python-version: '3.9'
           - os: ubuntu-latest
             python-version: '3.11'
           - os: ubuntu-latest
             python-version: '3.12'
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -44,7 +44,7 @@ jobs:
         python -m pytest
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.xml