diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2edb8bc..9770907 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,10 +16,10 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       - name: Set up Python 3.11
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.11"
           cache: pip
@@ -42,7 +42,7 @@ jobs:
 
       - name: Upload CI reports
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         with:
           name: fashionpedia-ci-reports-${{ github.run_id }}
           path: artifacts/