diff --git a/.github/workflows/manual_release.yml b/.github/workflows/manual_release.yml
index 6921f17..06932cd 100644
--- a/.github/workflows/manual_release.yml
+++ b/.github/workflows/manual_release.yml
@@ -6,9 +6,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
         with:
           python-version: '3.9'
 
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 6c0055d..784e23a 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -16,10 +16,10 @@ jobs:
         python-version: [3.9]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@3542bca2639a428e1796aaa6a2ffef0c0f575566 # v3
       with:
         python-version: ${{ matrix.python-version }}
 
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index 02765fe..44c9baf 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -35,7 +35,7 @@ jobs:
       - create-github-release
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       
       - name: Set up Python
         uses: actions/setup-python@v4