diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 10ec5e1..7e56549 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,8 +14,8 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v5
-      - uses: actions/setup-python@v6
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 788447a..e4f368a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,8 +12,8 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v5
-      - uses: actions/setup-python@v6
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
           python-version: "3.12"
           cache: pip