diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index cf99d202..efaeae23 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -11,15 +11,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
         with:
           path: .lycheecache
           key: cache-lychee-${{ github.sha }}
           restore-keys: cache-lychee-
 
-      - uses: lycheeverse/lychee-action@v2
+      - uses: lycheeverse/lychee-action@8646ba30535128ac92d33dfc9133794bfdd9b411 # v2
         with:
           fail: true
           args: >
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d0a893a0..68a8e1fb 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -9,10 +9,10 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Setup python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: 3.x
 
@@ -25,10 +25,10 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Setup python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: 3.x
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cc66d19a..15eafd6c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,10 +11,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: 3.x
 
@@ -29,7 +29,7 @@ jobs:
 
       - name: Upload packages artifact
         if: github.event_name == 'release'
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
         with:
           name: python-packages
           path: dist/
@@ -47,10 +47,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download packages artifact
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
         with:
           name: python-packages
           path: dist/
 
       - name: Publish packages to PyPI
-        uses: pypa/gh-action-pypi-publish@v1.14.0
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # v1.14.0
diff --git a/.github/workflows/releaser-pleaser.yml b/.github/workflows/releaser-pleaser.yml
index ebbf620c..7e552517 100644
--- a/.github/workflows/releaser-pleaser.yml
+++ b/.github/workflows/releaser-pleaser.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: releaser-pleaser
-        uses: apricote/releaser-pleaser@v0.8.0
+        uses: apricote/releaser-pleaser@a1ce9493fd3f3abe60f22c37249d257bc10081dc # v0.8.0
         with:
           token: ${{ secrets.HCLOUD_BOT_TOKEN }}
           extra-files: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index efb3c435..e7a01454 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,10 +20,10 @@ jobs:
 
     name: Python ${{ matrix.python-version }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Setup python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -37,6 +37,6 @@ jobs:
         if: >
           !startsWith(github.head_ref, 'renovate/') &&
           !startsWith(github.head_ref, 'releaser-pleaser--')
-        uses: codecov/codecov-action@v6
+        uses: codecov/codecov-action@e79a6962e0d4c0c17b229090214935d2e33f8354 # v6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}