diff --git a/.github/workflows/build_documentation.yml b/.github/workflows/build_documentation.yml
index ecf515b52..3ba814861 100644
--- a/.github/workflows/build_documentation.yml
+++ b/.github/workflows/build_documentation.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    uses: huggingface/doc-builder/.github/workflows/build_main_documentation.yml@main
+    uses: huggingface/doc-builder/.github/workflows/build_main_documentation.yml@90b4ee2c10b81b5c1a6367c4e6fc9e2fb510a7e3  # main
     with:
       commit_sha: ${{ github.sha }}
       package: computer-vision-course
diff --git a/.github/workflows/build_pr_documentation.yml b/.github/workflows/build_pr_documentation.yml
index 3f4bbae14..3400455fc 100644
--- a/.github/workflows/build_pr_documentation.yml
+++ b/.github/workflows/build_pr_documentation.yml
@@ -9,7 +9,7 @@ concurrency:
 
 jobs:
   build:
-    uses: huggingface/doc-builder/.github/workflows/build_pr_documentation.yml@main
+    uses: huggingface/doc-builder/.github/workflows/build_pr_documentation.yml@90b4ee2c10b81b5c1a6367c4e6fc9e2fb510a7e3  # main
     with:
       commit_sha: ${{ github.event.pull_request.head.sha }}
       pr_number: ${{ github.event.number }}
diff --git a/.github/workflows/quality.yml b/.github/workflows/quality.yml
index 17f4b0dd1..546f9e484 100644
--- a/.github/workflows/quality.yml
+++ b/.github/workflows/quality.yml
@@ -10,9 +10,9 @@ jobs:
   quality:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
     - name: Set up Python 3.8
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@e9aba2c848f5ebd159c070c61ea2c4e2b122355e  # v2
       with:
         python-version: 3.8
     - name: Install Python dependencies
diff --git a/.github/workflows/upload_pr_documentation.yml b/.github/workflows/upload_pr_documentation.yml
index be81a2b21..eb0307ae1 100644
--- a/.github/workflows/upload_pr_documentation.yml
+++ b/.github/workflows/upload_pr_documentation.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    uses: huggingface/doc-builder/.github/workflows/upload_pr_documentation.yml@main
+    uses: huggingface/doc-builder/.github/workflows/upload_pr_documentation.yml@90b4ee2c10b81b5c1a6367c4e6fc9e2fb510a7e3  # main
     with:
       package_name: computer-vision-course
       hub_base_path: https://moon-ci-docs.huggingface.co/learn