diff --git a/.github/workflows/check-pull-request.yaml b/.github/workflows/check-pull-request.yaml
index f13c440..000f7ad 100644
--- a/.github/workflows/check-pull-request.yaml
+++ b/.github/workflows/check-pull-request.yaml
@@ -20,10 +20,10 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: 3.10.15
 
@@ -32,7 +32,7 @@ jobs:
         run: sudo apt-get install pandoc
 
       - name: Run image
-        uses: abatilo/actions-poetry@v2.0.0
+        uses: abatilo/actions-poetry@3765cf608f2d4a72178a9fc5b918668e542b89b1 # v4.0.0
         with:
           poetry-version: 1.8.0