diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 20a8d7c..78b0f72 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -9,9 +9,9 @@ jobs:
   Check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - name: Install uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
         with:
           enable-cache: true
       - name: Set up Python
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 43f518b..f90e1e6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,9 +9,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - name: Install uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
         with:
           enable-cache: true
       - run: uv python install 3.12
@@ -27,10 +27,10 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.12"
 
@@ -41,4 +41,4 @@ jobs:
         run: python -m build
 
       - name: Publish to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2