diff --git a/.github/workflows/pr_ci.yml b/.github/workflows/pr_ci.yml
index 166c0ab6ab..002a397fd5 100644
--- a/.github/workflows/pr_ci.yml
+++ b/.github/workflows/pr_ci.yml
@@ -20,7 +20,7 @@ jobs:
       CCACHE_BASEDIR: "${{ github.workspace }}"
 
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
         with:
           submodules: 'recursive'
           fetch-depth: 0
diff --git a/.github/workflows/push_ci.yml b/.github/workflows/push_ci.yml
index 5c8de0a2c0..2c091c1503 100644
--- a/.github/workflows/push_ci.yml
+++ b/.github/workflows/push_ci.yml
@@ -23,7 +23,7 @@ jobs:
     if: ${{ !startsWith(github.event.head_commit.message, '[skip ci]') }} && success() && github.ref == 'refs/heads/main' }}
 
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
         with:
           submodules: 'recursive'
           fetch-depth: 0
@@ -177,7 +177,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       - name: Clone Telegram Bot API
         run: |
           git clone --recursive https://github.com/tdlib/telegram-bot-api.git