diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 2faad72..bd826c5 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -9,7 +9,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           submodules: recursive
       -
diff --git a/.github/workflows/pr-cleanup.yaml b/.github/workflows/pr-cleanup.yaml
index cfc1fa3..63ff6ae 100644
--- a/.github/workflows/pr-cleanup.yaml
+++ b/.github/workflows/pr-cleanup.yaml
@@ -9,7 +9,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           submodules: recursive
       -
diff --git a/.github/workflows/push-main.yaml b/.github/workflows/push-main.yaml
index 92b8d56..3ef34af 100644
--- a/.github/workflows/push-main.yaml
+++ b/.github/workflows/push-main.yaml
@@ -11,7 +11,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           submodules: recursive
       -