diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5dda70b7..c184f5a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     needs: lint
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -61,7 +61,7 @@ jobs:
     needs: lint
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -88,7 +88,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 3bd09aa0..f683cd00 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -13,7 +13,7 @@ jobs:
   deploy:
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
diff --git a/.github/workflows/version-bump.yml b/.github/workflows/version-bump.yml
index 9b3cb9f1..9ad3650d 100644
--- a/.github/workflows/version-bump.yml
+++ b/.github/workflows/version-bump.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
         with:
           fetch-depth: 2
       - name: bump