diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e54907f..3e1e076 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,9 +26,9 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11']
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c # v4
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -56,7 +56,7 @@ jobs:
 
       - name: Upload Results
         if: ${{ matrix.python-version == env.LATEST_PY_VERSION }}
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@29386c70ef20e286228c72b668a06fd0e8399192 # v1
         with:
           file: ./coverage.xml
           flags: unittests
@@ -67,9 +67,9 @@ jobs:
     needs: [tests]
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c # v4
         with:
           python-version: ${{ env.LATEST_PY_VERSION }}
 
@@ -109,9 +109,9 @@ jobs:
     runs-on: ubuntu-latest
     if: contains(github.ref, 'tags') && github.event_name == 'push'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c # v4
         with:
           python-version: ${{ env.LATEST_PY_VERSION }}
 
@@ -145,16 +145,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@27d0a4f181a40b142cce983c5393082c365d1480 # v1
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@f211e3e9ded2d9377c8cadc4489a4e38014bc4c9 # v1
 
       - name: Login to Github
-        uses: docker/login-action@v1
+        uses: docker/login-action@dd4fa0671be5250ee6f50aedf4cb05514abda2c7 # v1
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -168,7 +168,7 @@ jobs:
       # Push `latest` when commiting to master
       - name: Build and push
         if: github.ref == 'refs/heads/master'
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a # v2
         with:
           platforms: linux/amd64,linux/arm64
           context: .
@@ -180,7 +180,7 @@ jobs:
       # Push `{VERSION}` when pushing a new tag
       - name: Build and push
         if: startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release'
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a # v2
         with:
           platforms: linux/amd64,linux/arm64
           context: .
diff --git a/.github/workflows/deploy_mkdocs.yml b/.github/workflows/deploy_mkdocs.yml
index fe804ac..186ddd0 100644
--- a/.github/workflows/deploy_mkdocs.yml
+++ b/.github/workflows/deploy_mkdocs.yml
@@ -17,10 +17,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout master
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
       - name: Set up Python 3.8
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c # v4
         with:
           python-version: 3.8