diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f806017..02e268c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,11 +20,11 @@ jobs:
             rust: 1.59.0
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Install Rust components
         run: rustup component add rustfmt && rustup component add clippy
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d140768..524ea7d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -26,7 +26,7 @@ jobs:
             rust: 1.59.0
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Set env
         run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV