diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2b7f455..a87b938 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,15 +26,15 @@ jobs:
       UV_NO_CACHE: "1"
     steps:
       - name: Check out source
-        uses: actions/checkout@v7.0.1
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Set up Python 3.12
-        uses: actions/setup-python@v7
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7
         with:
           python-version: "3.12.14"
 
       - name: Set up uv
-        uses: astral-sh/setup-uv@v9.0.0
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9 # v9.0.0
         with:
           version: "0.12.7"
           enable-cache: false