diff --git a/.github/workflows/build-and-deploy.yml b/.github/workflows/build-and-deploy.yml
index 14069d1b..4e1dd7c4 100644
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
         with:
           fetch-depth: 0
-      - uses: DeterminateSystems/nix-installer-action@da36cb69b1c3247ad7a1f931ebfd954a1105ef14  # v14
+      - uses: DeterminateSystems/nix-installer-action@b92f66560d6f97d6576405a7bae901ab57e72b6a  # v15
       - uses: DeterminateSystems/magic-nix-cache-action@87b14cf437d03d37989d87f0fa5ce4f5dc1a330b  # v8
       - run: nix-build -A checks.x86_64-linux
       - run: |
diff --git a/.github/workflows/update-flake-lock.yml b/.github/workflows/update-flake-lock.yml
index 3c263523..f7c75cf9 100644
--- a/.github/workflows/update-flake-lock.yml
+++ b/.github/workflows/update-flake-lock.yml
@@ -11,5 +11,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
-      - uses: DeterminateSystems/nix-installer-action@da36cb69b1c3247ad7a1f931ebfd954a1105ef14  # v14
+      - uses: DeterminateSystems/nix-installer-action@b92f66560d6f97d6576405a7bae901ab57e72b6a  # v15
       - uses: DeterminateSystems/update-flake-lock@a2bbe0274e3a0c4194390a1e445f734c597ebc37  # v24