diff --git a/.github/workflows/develop_PR_builder.yml b/.github/workflows/develop_PR_builder.yml
index bb70486cd..ced932626 100644
--- a/.github/workflows/develop_PR_builder.yml
+++ b/.github/workflows/develop_PR_builder.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Gradle cache
         uses: actions/cache@v3
diff --git a/.github/workflows/develop_merge_builder.yml b/.github/workflows/develop_merge_builder.yml
index e4a4e171a..aa2708148 100644
--- a/.github/workflows/develop_merge_builder.yml
+++ b/.github/workflows/develop_merge_builder.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Gradle cache
         uses: actions/cache@v3