diff --git a/.github/workflows/quality.yaml b/.github/workflows/quality.yaml
index 644b6cf..64dd227 100644
--- a/.github/workflows/quality.yaml
+++ b/.github/workflows/quality.yaml
@@ -9,7 +9,7 @@ jobs:
     name: "Scalafmt + Scalafix"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Java
         uses: actions/setup-java@v4
@@ -36,7 +36,7 @@ jobs:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Java
         uses: actions/setup-java@v4
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index c138d2e..875e906 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -18,7 +18,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0