diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 795c4a3..2ff3560 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: DeterminateSystems/nix-installer-action@v16
+      - uses: DeterminateSystems/nix-installer-action@v21
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - run: nix flake check --impure
       - run: nix build --impure .#vm
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8200223..12f5746 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-      - uses: DeterminateSystems/nix-installer-action@v16
+      - uses: DeterminateSystems/nix-installer-action@v21
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - run: nix build --impure .#vm
       - name: Create GitHub Release