diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 47b05dc..2b7fe4b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup JDK
         uses: actions/setup-java@v3
         with:
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index fe6ddb2..b76dd82 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup JDK
         uses: actions/setup-java@v3
         with:
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index fdfa0e0..d2df8cb 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup JDK
         uses: actions/setup-java@v3
         with: