diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 605082e..7248148 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       - run: corepack enable
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
         with:
           node-version: lts/*
           cache: "pnpm"
diff --git a/.github/workflows/provenance.yml b/.github/workflows/provenance.yml
index 56cc103..e2300d8 100644
--- a/.github/workflows/provenance.yml
+++ b/.github/workflows/provenance.yml
@@ -13,7 +13,7 @@ jobs:
   check-provenance:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           fetch-depth: 0
       - name: Check provenance downgrades