diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b99537b..1469bf7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,7 @@ jobs:
             shell: "msys2 {0}"
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
         with:
           submodules: recursive
 
@@ -82,7 +82,7 @@ jobs:
 
       - name: Setup python
         id: setup-python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
         with:
           python-version: '3.11'